1.指股票跌到很深很深了，不能再跌了，就会反弹.2.借指是指某项事物向不好的方向发展到极致后开始回升. 比如一只球队的战绩一直很差,不断输球到了一个很坏的地步,然后开始走上坡路,突然开始不断赢球,就可以叫谷底反弹.
经济学家们认为经济增长的一些预期增加是谷底反弹。
Economists suggest some of the expected increase in economic growth is a bounce off the bottom.
但它同样引出一个问题，这究竟是暂时脱离谷底的反弹还是新一轮牛市的开始？
It invites the question: is this just a bounce off the bottom or the start of a new uptrend?
在商品价格接近谷底时达成了该协议，而在价格已有所反弹的当下，该协议看起来相当“大方”(对中国铝业来说)。
It was struck when commodity prices were near their trough and looks too generous now that they have recovered somewhat (see Buttonwood).
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