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bottom是什么意思?

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bottom是什么意思?
ottom
KK:[]
DJ:[]
n.
1.底;底部;下端[C]
The bottom of the cup is broken.
这杯子的底破了.
2.屁股,臀部[C]
3.(海、河的)底部,水底[the S]
4.最低下的部分,底层[the S]
The apples at the bottom of the basket are smaller.
篮子底部的苹果较小.
5.远端,尽头[the S] [(+of)]
6.起点;原因[the S] [(+of)]
We will get to the bottom of the mystery.
我们将揭开这个谜.
7.(汽车等的)最低档[U]
8.吃水线以下的船体[C]
9.低洼地[P]
10.持久力,耐力[U]
a.[Z]
1.最低的;最后的,最下的
The bottom layer is a mixture of sand and clay.
最下面的一层是沙和泥的混合物.
vt.
1.在...上装底
2.对...寻根究底
They tried to bottom his motives but failed.
他们曾想追查他的动机但未成功.
vi.
1.基于,根据[(+on/upon)]
Upon what does his claim bottom?
他提出这一要求的根据是什么?
2.到达底部;降至最低点[(+out)]
The recession has bottomed out.
经济衰退已至谷底.