weak/feeble/frail.导航词义：虚弱的

1. weak:adj. 虚弱的.最普通用词，使用范围很广，既可指身体虚弱无力的，也可引申用于力量、意志、权力、性格等方面，表示“薄弱的”、“软弱的”等。

Her mother was weak from a long illness.

她母亲长期患病，身体很虚弱。

I'm very weak when it comes to giving up smoking.

在戒烟问题上我意志很薄弱。

The enemy became so weak that they could not go on with the war.

敌人力量变弱，无法再继续这场战争了。

2. feeble:adj. 虚弱的，无力的.语气较 weak 强，尤指身体、脉搏、声音等极为虚弱而无力的。

His pulse was too feeble to feel.

他的脉搏太弱了，摸不着。

The newborn baby gave a feeble cry.

那个新生儿哭声很弱。

Her feeble arm dropped powerless to her side.

她那虚弱的胳臂无力地垂在身边。

3. frail:adj. 虚弱的，瘦弱的.多指因年迈或生病而身体瘦弱的、虚弱的、衰弱的。

The old man is growing thin and frail.

那位老人日渐瘦弱。

She was still feeling a bit frail.

她仍然感觉身体有点虚弱。

Her frail hands could hardly hold a cup.

她虚弱的手几乎连杯子也拿不住。

全部

1·The heartbeat was feeble and irregular.

心搏无力，心律不齐。《牛津词典》

2·Don't be so feeble! Tell her you don't want to go.

别那么软弱了！告诉她你不想去。《牛津词典》

3·At last a feeble voice replied, Thank you so much, dear Ratty!

最后，一个微弱无力的声音回答道：“非常感谢你，亲爱的鼠仔！”

4·We were locked in the paddy wagon while our guard watched a feeble pro-Qaddafi protest.

我们被锁在囚车里，而我们的警卫则看着一场支持卡扎菲的微弱抗议。

5·Thank you kindly, Sir, said Toad in a feeble voice, I'm feeling a great deal better!

“谢谢你，先生，”托德声音微弱地说，“我觉得好多了！”

6·When their voices died away there came cold silence over the lagoon, and then a feeble cry.

当他们的声音渐渐消失的时候，泻湖上空出现了冰冷的寂静，接着是一声微弱的哭声。

7·Feeble steps were heard on the stairs, and an old man, tall and frail, odorous of pipe smoke.

楼梯上响起了微弱的脚步声，一个病怏怏、浑身烟臭、满嘴烟渍的高个子老头儿犹犹豫豫地走了进来。

8·I wasn't asleep, he said in a hoarse, feeble voice, I heard every word you fellows were saying.

“我没有睡着，”他声音嘶哑无力地说，“你们说的每一个字我都听见了。”

9·The reason often given for the low regard in which smell is held is that, in comparison with its importance among animals, the human sense of smell is feeble and undeveloped.

人们通常不重视嗅觉的原因是，虽然嗅觉对于动物很重要，但人类的嗅觉是薄弱而不发达的。

10·This is a particularly feeble argument.

这是个特别站不住脚的论点。《柯林斯英汉双解大词典》

微弱

1·Feeble steps were heard on the stairs, and an old man, tall and frail, odorous of pipe smoke.

楼梯上响起了微弱的脚步声，一个病怏怏、浑身烟臭、满嘴烟渍的高个子老头儿犹犹豫豫地走了进来。

2·Another explanation might be that productivity growth has ground to a halt, which is neither surprising, given its rather feeble performance to date, nor bad.

另一方面或许就是生产率的增长陷于了暂时的停顿，再考虑到它对于经济数据微弱的贡献，这一点就不奇怪了。

3·The results of this study imply that the feeble, but erratic behavior of the black hole in the Milky Way could potentially be typical for present-day supermassive black holes.

研究结果表明，银河系黑洞的这种微弱而不稳定的行为很有可能在现今的特大质量黑洞中具有典型意义。

4·Its feeble bleating is soon replaced by the frolicking leaps of a young lamb.

它微弱的咩咩叫声随即被小羊惊喜的尖叫所取代。

5·And the feeble recovery is petering out.

并且，微弱的复苏将要结束。

无力的

1·The heartbeat was feeble and irregular.

心搏无力，心律不齐。《牛津词典》

2·You stammer some feeble responses by way of reply, feeling your strength ebb away until you find an excuse to leave.

你结结巴巴地作出一个无力的回应，同时感觉自己的力量在消退，直到你找到一个借口离开。

3·Still, if you think this is bad, you should hear the B-side: Mendelssohn’s Wedding March played on a feeble synthesizer over a disco beat.

当然，如果你认为这个很糟糕，你还可以听听B面：门德尔松的婚礼进行曲附着迪斯科的节拍在无力的合成器上播放。

4·Yet he trembled, and turned to Hester with an expression of doubt and anxiety in his eyes, not the less evidently betrayed, that there was a feeble smile upon his lips.

然而他却颤抖着，转向海丝特，眼睛中流露着疑虑的神色，嘴角上也同样明显地带着一丝无力的微笑。

5·The public outcry in Bangladesh has been huge, India's apology feeble.

这件事在孟加拉国引起舆论一片哗然，但印度只进行了无力的道歉。

虚弱的

1·How feeble and pale he looked, amid all his triumph!

他在大获全胜之际，看起来是多么虚弱和苍白啊！

2·Now he was back where he started, and his Yankee stadium sat like a feeble, gutted ghost beside the new stadium.

现在他回到了自己的出发点，在新球场衬托下，他的老洋基球场像个虚弱而沮丧的鬼影。

3·A handful of tiny babies with feeble limbs populated a ward in anintensive nutrition clinic in the desert town of Tanout.

在沙漠小镇塔努特拥挤的营养诊所，一些四肢虚弱的小婴儿住在一个病房。

4·Mr Romney's support, at just over 20% in most polls, remains quite feeble.

罗姆尼的支持率，在大多数民意调查中刚刚过了20%，仍然十分虚弱。

5·At 250 parts per million CO2, the shellfish grew vigorously, and at 750 PPM and higher they were crippled, feeble creatures with thin shells and weak connective tissues.

在CO2含量为百万分之250时，甲壳类生物生长得很好，而到了百万分之750或更高时，它们的甲壳变薄、连结物质变弱，成了残破而虚弱的生物。

软弱的

1·And he spake before his brethren and the army of Samaria, and said, What do these feeble Jews?

对他弟兄和撒玛利亚的军兵说，这些软弱的犹大人做什么呢。

2·Are Europeans really as feeble as he asserts?

欧洲人真的像他说的那样软弱吗？

3·There is something feeble and a little contemptible about a man who cannot face the perils of life without the help of comfortable myths.

倘若一个人不依靠温暖的神话就无法面对生活中的不幸，那么他可就有点软弱和可鄙了。

4·For years, it pottered along, weighed down by the regulations that made up the licence raj, producing only a feeble Hindu rate of growth.

多年来，它一直疲于奔命，由法规规定做出了牌照raj，仅仅产生了一个软弱的“印度教徒报”的增长速度。

5·The conies are but a feeble folk, yet make they their houses in the rocks;

沙番是软弱之类，却在磐石中造房。

弱

1·If a light illuminates a certain space, its intensity at twice the distance is not twice as feeble, but two times two, equal four times, as feeble.

如果一个光源照亮某一个地方，这个地方距离光源越远，光照强度会越弱，但是光照强度并不是与光源距离等比例地减弱，就是说，距离延长两倍，光照强度并不是减弱两倍，而是减弱两倍的两倍，等于减弱四倍；

2·It looks a little feeble in this form — few 'motivations', little apparent action and no sub-plot.

形式上看起来有些弱——没什么“动机”，没有明显的动作，没有细部情节。

3·You'd need arcs or strobe lights for that kind of effect, even in this feeble, fading light.

这就要有弧光灯或者闪光灯，虽然光线已经非常弱。

4·He was lying on his sickbed with a feeble voice.

他躺在病床上，声音颤弱。

5·Karma has been customised as a misunderstood concept that explains the feeble connections of ones actions and the repercussions of them.

宗业(因果报应)经常被误解为一种解释个体行为及其后果的弱关系的概念。

薄弱的

1·The reason often given for the low regard in which smell is held is that, in comparison with its importance among animals, the human sense of smell is feeble and undeveloped.

人们通常不重视嗅觉的原因是，虽然嗅觉对于动物很重要，但人类的嗅觉是薄弱而不发达的。

2·All of this ancient mystery that theologians agree cannot be fully understood to our feeble minds.

神学家都认为我们薄弱的智力，是无法完全理解这些古老的谜题的。

3·This combination of feeble production and feverish consumption, the argument runs, means that demand for commodities will outpace supply for years to come.

有言论表明，薄弱的生产与狂热的消费的结合体意味着对农产品和矿产品的需求会超过供给，这将在近几年显现。

4·But the period synonym research on ancient Chinese is still a feeble link.

但古汉语同义词的断代研究，迄今还是一个薄弱环节。

5·While the insulation is usually the feeble tache of high voltage electric apparatus and a large part of malfunctions are brought by the destruction of insulation.

同时绝缘通常是高压电器设备中的薄弱环节，故障中很大一部分就是由于绝缘破坏而造成的。

衰弱

1·But theirs was a feeble thing, only just capable of reproducing.

但他们造出的只是个衰弱的小东西，勉强能够繁殖。

2·Stephen King and Ian Morris of HSBC point out that growth in consumer spending, total investment and exports in this cycle has been correspondingly feeble.

HSBC的Stephen King和Ian Morris指出，此循环周期中的居民消费增长、总投资额及输出额都相对比较衰弱。

3·This is the early winter, a trend feeble simultaneously is breeding the new hope season!

这就是初冬，一个走向衰弱同时又孕育着新希望的季节！

4·Extreme feeble, appetite extremely missing, the refuse food to utilize the nasal feeding diet.

极度衰弱、食欲极差者，拒绝进食者应当运用鼻饲饮食。

乏力

1·Some show signs of renewed weakness: America's private-sector job growth in May, for instance, was surprisingly feeble.

显示了一些疲软的新迹象：比如，5月份，美国私营部门的就业增长令人意外的乏力。

2·This shrunken illustration is a feeble representation of the full, gigantic, high-resolution original.

下面这张截取的图片和该款相机那种完整的、不可思议的、高清晰度的原始图片相比，其表现力度是乏力的。

3·If you have symptoms like feeling cold, feeling hot, sweating intensively, feeble, please go to the university hospital and report to the international student office.

如果出现发冷、发热、出汗、乏力等症状，应当尽快去校医院检查，并向留学生办公室报告。

苍白无力的

1·Adoption of the relevant circumstances can be seen that in this case handling, a national legal time appear to be so feeble!

通过该案相关情节可以看出，在此案办理中，国家法律一时间显得那么苍白无力！

2·The article points out that: The system of incorruption does not exist in isolation, and the unsoundly related system will lead the incorruption system deficient or even feeble.

廉政制度不是孤立存在的，相关制度的不健全会导致廉政制度的缺陷甚至苍白无力。