探底 meaning in English

lock for bottom

A growing group of forecasters is now fretting about a “ w ” shaped , or double - dip , recession
有越来越多的分析人士备感焦虑地预测，此次衰退会呈“ w ”型，或者说，将二次探底。
Today the stock market was down , the professionals said that the bull market did not last any longer , or it would still continue to fall
今天股市跌了，专家就说中国的牛市走到尽头了，或者说还得继续探底。
This week an index that tracks bonds consisting of subprime loans made in 2006 dipped below 60 for the first time , down from 97 in january ( see chart )
这周， 2006年设立的一个跟踪由次级贷款组成的债券的指数，自今年1月份跌倒97点以来，第一次探底到60点以下（如上图）。
Use the probe bottom sonar system to make experiments in the national key laboratory noise elimination water pool . according to the experiment results , the probe bottom sonar system work in good order . it can accurately obtain the distance information
在国家重点实验室消声水池进行探底声纳系统实验，并根据实验结果，证明了探底声纳系统工作正常，能准确的探测出距离信息。