bottom
/ˈbɔtəm; `bɑtəm/ n
1 [C usu sing 通常作单数]
lowest part or point of sth 物体最低的部分或最低点
the bottom of a hill, mountain, slope, valley, etc 丘、山、坡、谷等的底部
The telephone is at the bottom of the stairs. 电话在楼梯下面.
There are tea leaves in the bottom of my cup. 我的杯底有茶叶.
The book I want is (right) at the bottom of the pile. 我要的那本书（就）在这堆书底下.
Sign your name at the bottom of the page, please. 请在这一页的下方签上你的名字.
2 [C usu sing 通常作单数]
part on which sth rests; underside 物体最低的部位; 底面
The manufacturer's name is on the bottom of the plate. 制造厂商的名称在盘子背面.
3 [C] part of the body on which one sits; buttocks 臀部; 屁股
fall on one's bottom 摔倒时屁股著地
smack a child's bottom 打孩子的屁股.
4 [sing] farthest part or point (of sth); far end (of sth) 最远的部分; 最远点
There's a pub at the bottom of the road. 路的尽头有一家酒馆.
The tool shed is at the bottom of the garden, ie at the end farthest from the house. 工具房在花园的尽里头.
5 [sing] (person or group in the) lowest position in a class, list, etc （处於等级、名单等）最低位置（的人或团体）
He was always bottom of the class in maths. 他的数学成绩在班上总是垫底.
Our team came/was bottom of the league last season. 我们队在上季度的联赛中排名最後.
She started at the bottom and worked her way up to become manager of the company. 她从最低的位置干起, 通过努力终於当上了公司的经理.
6 [sing] ground under a sea, lake or river （海洋、湖泊或河流的）底
The water is very deep here, I can't touch (the) bottom. 这儿水很深, 我摸不著底.
The `Titanic' went to the bottom, ie sank. ｀提坦＇号客轮沉入海底了.
7 [C] ship's hull; keel 船身; （船的）龙骨.
8 [C usu pl 通常作复数]
lower part of a two-piece garment （两件一套的服装的）下件: pyjama bottoms 睡裤
track suit bottoms 运动裤.
9 [U] lowest gear 最低挡: drive up a steep hill in bottom 用低挡驶上陡峭的山.
10 (idm 习语) at bottom in reality; really; basically 其实; 实际上; bottom, adj [attrib 作定语]
1 in the lowest or last position 最低的; 最後的
the bottom line (on a page) （一页的）最末一行
the bottom rung (of a ladder) （梯子的）最下一级
the bottom step (of a flight of stairs) （一段阶梯的）最下一级
Put your books on the bottom shelf. 把你的书放在最下层的架子上.
go up a hill in bottom gear 用低挡上山.
2 (idm 习语) bet one's bottom dollar => bet. bottom, v (phr v) bottom out (commerce 商) (of prices, shares, etc) reach the lowest level （指物价、股票价格等）跌落最低水平
There is no sign that the recession has bottomed out yet. 没有迹象表明萧条已经到了极点.