not turn a hair

• adj. 不动声色(丝毫不受干扰)

例句

用作形容词 (adj.)

1. A vague air of mystery envelops them.
   然后他在不动声色地离开。
2. He is good at delivering jokes in a deadpan way.
   他很擅长不动声色的讲笑话。