Definition
To behave in a calm and controlled manner, often to hide one's strong interest or desire for something.
装腔作镇
I tried to play it cool when she walked into the room, even though I really wanted to talk to her.
当她走进房间时，我试着表现得很冷静，即使我真的很想跟她说话。
He tried to play it cool during the interview, even though he desperately wanted the job.
他在面试时试着表现得很冷静，即使他非常想要这份工作。
She played it cool as she opened the gift, even though she was very excited inside.
她打开礼物时表现得很冷静，即使她内心非常兴奋。