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1·I hate unnecessary waste.

我憎恨不必要的浪费。《牛津词典》

2·The slaughter of whales is unnecessary and inhuman.

对鲸的屠宰是不必要且不人道的。《柯林斯英汉双解大词典》

3·That last comment was a little unnecessary, wasn't it?

那最后一点评论有点多余，不是吗？《牛津词典》

4·There could be a serious loss of efficiency through unnecessary duplication of resources.

不必要的资源重复会导致严重的效率损耗。《柯林斯英汉双解大词典》

5·The press, making a mountain out of a molehill, precipitated an unnecessary economic crisis.

新闻界小题大做，促成了一场不必要的经济危机。《柯林斯英汉双解大词典》

6·He found it unnecessary for us to stay behind.

他感到我们不必要留下来。《新英汉大辞典》

7·He tries to draw unnecessary attention to himself.

他试图引起他人不必要的关注。

8·This will prevent unnecessary accidents and loss of life.

这将防止不必要的事故和生命的损失。

9·We should trim off the unnecessary parts of our spending.

我们应该削减不必要的开销。

10·The accountant checked this unnecessary spending in good time.

会计及时卡住了这笔不必要的开支。《新英汉大辞典》

不必要

1·The slaughter of whales is unnecessary and inhuman.

对鲸的屠宰是不必要且不人道的。《柯林斯英汉双解大词典》

2·There could be a serious loss of efficiency through unnecessary duplication of resources.

不必要的资源重复会导致严重的效率损耗。《柯林斯英汉双解大词典》

3·He found it unnecessary for us to stay behind.

他感到我们不必要留下来。《新英汉大辞典》

4·We should trim off the unnecessary parts of our spending.

我们应该削减不必要的开销。

5·One of the biggest myths in the last year is that social media experts make PR obsolete and unnecessary.

在过去一年中，最大的神话之一是社交媒体专家使公共关系过时和不必要。

没有必要的

1·Please, Mary, this is all so unnecessary.

求你了，玛丽，这一切根本没有必要。《柯林斯英汉双解大词典》

2·Many school have strict restrictions on students' clothes, which I think is unnecessary.

许多学校对于学生的穿着有着非常严格的限制，我认为这是没有必要的。

3·I think it was totally unnecessary; it should have been avoided rather than costing all the people trouble because there's been a lot of traffic and disruptions all over.

她说她烦透了。她说：“我认为这完全没有必要，它应该是可以避免的，而不是给所有人造成麻烦，现在到处都是交通拥挤，混乱不堪。”

4·Sure, those things are great, but they're only better if you believe they're better, and more importantly, the comparison is totally unnecessary.

当然，这些事情是非常美好的，但是它们之所以美好是因为你认为如此。更重要的是，这种比较是完全没有必要的。

5·Unnecessary miscommunication. - say what you mean. Mean what you say. Speak clearly. Ask questions. Clarify things until you understand them.

没有必要的误解-说你要表达的意思。清晰的表达。提出问题。把事物分类直到你能理解他们。

多余

1·That last comment was a little unnecessary, wasn't it?

那最后一点评论有点多余，不是吗？《牛津词典》

2·Will men become increasingly feminine and unnecessary?

男性日益女性化，越来越多余？

3·However, take note: Using frameworks involves a learning curve and can bulk up your web page sizes with unnecessary style rules and markup.

但另一方面：使用框架会增加学习成本并且会产生多余的样式和标记代码，最终导致网页代码冗余。

4·That, combined with ignorance about precisely how much the unnecessary use of antibiotics contributes to increasing resistance, makes restriction highly controversial.

加上不清楚多余使用会在哪种程度上导致抗药性都使得限制使用变得备受争议。

5·Nick Reilly, who heads GM’s international operations, says that part of the answer is to adopt low-cost manufacturing techniques and not to load cheap cars with unnecessary technology.

GM全球负责人Nick Reilly认为盈利的方法就是采取低成本的制造工艺，减少在低端车上多余技术的应用。

没必要的

1·Taking out travel insurance may seem an unnecessary expense, but it is a must.

旅游保险费用看起来似乎是没必要的，但却是必不可少的开支。《柯林斯英汉双解大词典》

2·The cooling wind swept through out bedroom windows, making air conditioning unnecessary.

清爽的风通过窗户吹进了卧室，没必要开空调了。

3·It causes unnecessary pressure and problems, and it wastes opportunities, time, and money.

它引起没必要的压力和问题，也浪费了机会，时间和金钱。

4·Money is always circulating from one pocket to another. Without the commodity transfer to meet folks' needs, the existence of money as a medium is unnecessary.

金钱是流通物，从这个口袋流到那个口袋，如果没有满足人们真实需要的商品的迁移，钞票这种信物就没必要存在。

5·For: it is impossible to copy the classic, therefore it is unnecessary to defile it.

正方：经典是无法复制的，所以没必要去亵渎经典。

无用的

1·The United States Treasury was compelled to acquire, at ridiculous prices far above the market level, hoards of unnecessary silver, and to store it in vaults.

美国财政部被强制用以高于市场平均水平的荒谬价格来获得成堆的无用白银，并且将它们储存在银行金库里。

2·But it's superfluous, really-which is why calling someone a fifth wheel is a way of calling them unnecessary, basically a tagalong.

但它是多余的，真的- - -这就是为什么将一个人称作“第五轮”是指他们无用，根本是个跟屁虫。

3·On the surface that seems like a great argument, but it's completely unnecessary.

从表面上看，这是个不可批驳的理由，但是实际上这是完全无用的。

4·We regard them as unnecessary creatures that do more harm than good.

我们把昆虫当作害多益少的无用东西。

5·The acquirement of wealth will eventually be an unnecessary goal as it will be fairly spread around, and you shall not experience lack where your needs are concerned.

财富的获得将最终成为一个无用的目标，因为它将广为流传，并且你们不会再体验需求的缺乏。

非必要

1·The purpose of this shortcut is to eliminate all unnecessary artifacts — that is, artifacts that don't immediately contribute to the ultimate goal of producing code or test cases.

此“捷径”的目的是去除所有非必要的工件——换句话说，不立即为生成代码或测试案例的最终目标做出贡献的工件。

2·It will also reducing unnecessary alarm rate by incorporating the ADS-B state vector, aircraft intent, and other information.

它通过综合ads - B状态向量、飞行器目标和其它信息，来减少非必要的警报频率。

3·When gathering contact information, only gather the demographic information you really need - asking for unnecessary information annoys people and may discourage them from signing up.

收集联系方式的时候，只收集你所需要的信息——索取非必要信息会让用户厌烦并停止登记信息。

4·Also, do not confuse this viewpoint String from the UML specification with the Modeling viewpoints used to hide unnecessary elements of the user interface.

同样，不要把这个来自UML规范的观察点String与用来隐藏用户界面的非必要元素的Modeling观察点搞混淆。

5·In China, there is less attention paid to animal protection issues as there are in the West, and some Chinese cultural traditions result in unnecessary cruelty to animals.

在中国，动物保护问题并不像在西方社会那样受人关注。而在中国，一部分陈旧的文化传统，导致了动物们遭受了种种非必要的虐待。

非必须的

1·This category includes unnecessary purchases such as clothing rentals and storage, dry cleaning, jewelry, and watch repair.

这一类包括非必须的购买如衣服租赁和储存、干洗、珠宝和手表维修。

2·Don't include unnecessary images.

不要包含非必须的图像。

(1)unnecessary expenses不必要的开支