你必须搞清状况以及自己的底线。You have to know what's what and when to draw the line.马丁内兹发球的时候通常站在底线处。Martinez, when she served, usually stayed on the baseline.她说95,000英镑是她的底线。She says £95,000 is her bottom line....

“底线”的英语可以翻译为：[计] underscore，base line ...