bottom/bed/floor.导航词义：底部

1. bottom:n. 底部，海底，河底.词义最广泛，可指各种事物的最底端部分。

Hold the bottom of the ladder for me, please!

请帮我扶住梯子下部！

Be careful! The bottom of the pool is very slippery.

小心！池底很滑。

So many fish live on the sea bottom.

生活在海底的鱼数量繁多。

2. bed:n. 底座；（河）床.指构成某物底部的一层，也指河、湖、海等的水底部分。

on the sea bed

在海底

the bed of a river

河床

All the child wants is the prawns on a bed of lettuce.

这个孩子只想吃铺在生菜上面的大虾。

The railway was built on a bed of solid rock.

铁路建在硬石地基上。

3. floor:n. 底，面，地板.指海洋、山洞等的底，或建筑物中的地板、地面。

creatures living on the ocean floor

生活在海底的生物

the floor of a bridg

桥面

He left his books lying all over the floor.

他把书扔得满地都是。

全部

1·He sat at the bottom of the stairs.

他坐在楼梯底部。《柯林斯英汉双解大词典》

2·She says $95,000 is her bottom line.

她说$95000是她的底线。《柯林斯英汉双解大词典》

3·The marriage had reached rock bottom.

婚姻已经走到了尽头。《牛津词典》

4·The ship sank to the bottom of the sea.

船沉入海底。《牛津词典》

5·I found some coins at the bottom of my bag.

我在我的手提包底找到了几枚硬币。《牛津词典》

6·He dived in and hit his head on the bottom.

他跳进水里，头撞到了池底。《牛津词典》

7·The wreck is lying at the bottom of the sea.

沉船躺在海底。《牛津词典》

8·There was a stream at the bottom of the garden.

花园尽头有一条小溪。《牛津词典》

9·There was some sludge at the bottom of the tank.

油箱底有油泥。《牛津词典》

10·Gingerly, she put her hand in deeper, to the bottom.

她小心翼翼地把手伸得更深，直到底部。《柯林斯英汉双解大词典》

底部

1·When the bag is folded, the bottom overlaps one side.

把包折叠起来时，其底部与一边就重合了。《柯林斯英汉双解大词典》

2·Leave a gap at the top and bottom so air can circulate.

在顶部和底部各留一点空隙，这样空气就可以流通了。《柯林斯英汉双解大词典》

3·The correct answers can be found at the bottom of page 8.

正确答案可以在第8页的底部找到。《柯林斯英汉双解大词典》

4·The number at the bottom is the recommended water temperature in centigrade.

底部的数字为建议性摄氏度水温。《柯林斯英汉双解大词典》

5·The windows didn't fit at the bottom so for a while we froze even in the middle of summer.

那些窗子的底部关不严，所以有段时间我们甚至在仲夏时节也感到极冷。《柯林斯英汉双解大词典》

底

1·There's an extra blanket in the bottom drawer of the cupboard.

衣橱的底柜有一条备用毯。《柯林斯英汉双解大词典》

2·Pads which bottom out, should not have spring pockets.

最底的垫板，不需要弹簧保护装置。

3·The object, of course, is to get the bottom of the pie plate before the other people.

当然，这样做的目的是比别人先吃到馅饼底。

4·He's got bottom two pair in an unraised pot.

他在一个没有加注过的彩池里，拿到了底两对。

5·This bottom of bucket has worn through.

这个桶底已经磨穿了。

底层

1·These workers are at the bottom of the economic heap.

这些工人处在经济结构的底层。《牛津词典》

2·It's tough at the top, he said. It's tougher at the bottom, riposted the billionaire.

“身居高位很辛苦，”他说。“在底层更辛苦，”亿万富翁机敏地答道。《柯林斯英汉双解大词典》

3·Residents of Foggy Bottom frequent the complex to shop in the supermarket or pharmacy on its lower level.

雾谷的居民经常到大厦底层的超市或药店购物。

4·Companies in search of the much-vaunted fortune at the bottom of the pyramid have to start not with consumers but with non-consumers.

在金字塔的底层苦苦寻找曾被大肆吹嘘存在宝藏的公司，一开始见不到消费者，只有非消费者。

5·This is the opposite. We're showing how complex traits like memory can be built from the bottom up, from things that are really very simple.

现在刚好相反，我们所做的是从底层的，一些确实非常简单的东西构建像记忆能力一样的复杂特性。

垫底

1·When I arrived, the team was bottom of the league and the whole place was on a real downer.

当我到达时，这个队伍在联赛中垫底，整个气氛令人感到沮丧。《柯林斯英汉双解大词典》

2·He was always at the bottom of the math class.

他的数学成绩在班上总是垫底。

3·You can make vegetarian chili by removing the bottom beef and adding an extra can of black beans or tofu.

你可以制作素食辣椒，你所需做的仅仅是把垫底的牛肉去掉并额外加进一个黑豆或豆腐罐头。

4·Bakersfield and Fresno in California came in at the very bottom of the list because their high poverty rate and low scores in the major categories.

加利福尼亚的贝克尔斯·菲尔德和弗雷斯诺在排行榜中垫底，因为这两个城市的贫困率高，在主要评比项中得分较低。

5·South Africa regularly comes bottom or near the bottom in international literacy, numeracy and science tests.

在全球的语文、数学和科学测试中，南非常常在垫底或在底部徘徊。

屁股

1·I've often wondered why people laugh at the picture of a big belly businessman slipping on a banana skin and falling on his bottom.

我经常在想，为什么人们看到一个大肚腩商人踩在香蕉皮上滑倒，跌倒屁股着地的照片会发笑。

下部

1·The strategic alignment of a large, faint crater at the bottom edge of Dione completes the astronomical illusion.

狄俄涅“下部”边缘上巨大而模糊的火山口关键性的校直完成了这个天文学假象。

2·There is also a locked door on the bottom.

在下部还有一道被锁上的门。

3·Just like a real iPhone the speakers are at the bottom of the case, only these ones are powered with a subwoofer, two mid range tweeters and two other speakers.

同真的iPhone一样，这款 “苹果桌子”的扬声器在机身下部，由一个重低音喇叭和两个中高音喇叭及其他两个喇叭组成。

4·Validate the Settings: click Test connection on the bottom of the page.

检验设置：点击页面下部的Test connection。

5·Is because, female bottom haemorrhage what?

女性下部出血是因为什么?。

底端

1·Most of it was burned, but the bottom of one page was not burned.

大部分信已烧焦了，只有一页信纸的底端还未被烧尽。

2·The bottom of the candle is fused with its holder.

蜡烛的底端与烛台熔在一起。

3·The mercury seems painted to the bottom of the thermometer.

温度计里的水银柱降到了底端。

4·NGC 4697 is beyond this frame above and to the left, but a smaller irregular galaxy NGC 4731a can be seen near the bottom in impressive detail with its own young blue star clusters.

NGC 4697在这帧照片的左上画面之外，而画面底端可见较小的不规则星系ngc 4731a，它自己的年轻蓝色星团细节令人印象深刻。

5·Near the image bottom lies IC 4592, the Blue Horsehead nebula.

在照片底端附近是有蓝色马头星云之称的IC 4592。

尽头

1·There was a stream at the bottom of the garden.

花园尽头有一条小溪。《牛津词典》

2·Green tents at the bottom of Pheasant Wood mark the position of eight pits dug hurriedly behind the German lines in 1916.

在雉鸡林的尽头竖起的绿色帐篷，标志着八个坑的位置，是1916年在德国战线后方仓促地挖出来的。

3·At least, she believes it to be so; but it is an error to imagine that fate can be exhausted, and that one has reached the bottom of anything whatever.

至少她是那么想的，但是如果自以为已经受尽命中的折磨，自以为已经走到什么东西的尽头，那可就想错了。

4·The bottom of the garden was lost in mist and darkness.

园子的尽头隐没在迷雾和夜色中了。

5·For a decade, the fastest growth in America's mortgage markets has been at the bottom.

十年里，美国抵押贷款市场最快速的增长也走到了尽头。

底下的

1·He put his foot on the bottom rung to keep the ladder steady.

他用脚踩住最底下的横档稳住梯子。《牛津词典》

2·Dennis peered into the room and saw her take a small red object out of her briefcase and quickly hide it in the bottom drawer of her dresser.

丹尼斯窥视着房间里的一举一动，只见她从公文包里拿出一个红色的小东西，快速地把它藏在梳妆台最底下的抽屉里。

3·And Mary and Laura would sleep in the bottom bed, where it was.

并且，玛丽和劳拉可以睡在底下的床上，就在那里。

4·This causes them to jump to something like the font on the bottom because it feels more unique and interesting.

这让他们跳到底下的那种字体去，因为觉得它更为独特、更加有趣。

5·They scoop up insects and larvae, shellfish, and worms in their bill along with bits of gravel and mud from the bottom.

它把昆虫和幼虫、贝类动物以及蠕虫连同底下的碎石和泥土一起兜到嘴里。

(1)at the bottom在底部；在底端

(1)at the bottom of在…的底部

(1)from top to bottom完完全全，从头到脚

(1)bottom line结果；概要；帐本底线

(1)on the bottom在底部

(1)top and bottom上下；顶层及底层