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 楼主|
发表于 2009-10-17 21:12:50
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| 2009/10/17 bottom
 at the bottom of = ultimately responsible for是……的根本原因[起因、祸根]
 I suspect that somebody in the stores is at the bottom of these mysterious thefts of stock.
 我怀疑这些仓库里的某一个人是这些货物神秘失窃的罪魁祸首。
 
 bottom fall out of = collapse出现……暴跌的局面
 The value of the shares tumbled when the bottom fell out of  the market.
 股票市场暴跌时,股票的价值就下跌。
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