中英成语俚语800对030：不动声色

　　不动声色

　　Set one's face like a flint.

　　Keep a straight face.

　　keep one's countenance.

　　Bit one's lips.

　　Keep quiet.

　　As quiet as a mouse.

　　eg：He sat there, setting his face like a flint and tried to find out who was the suspect.

　　同义词：面不改色 Without turning a hair.

　　反义词：虚张声势 Barking dogs seldom bite.