to keep one's cool
沉不住气
lose one's cool
这一回他沉不住气了。
This time he totally lost his composure.
你可真沉得住气。
You are a real cool customer.
汉译英翻译词典收录86165条汉英翻译词条，基本涵盖了全部常用中文字词的英语拼写、翻译、音标、读音、用法、例句等，是英语学习的有利工具。