informal
someone who stays calm and does not show their emotions, even in a difficult situation.
I can imagine Pete being good at negotiating. He's a pretty cool customer.
英语词组固定搭配大全包含18674条英汉双解词组，基本涵盖了全部常用英文词组、短语的翻译及用法，是英语学习的有利工具。