not turn a hair
US /nɑt tɜrn ə hɛr/
UK /nɒt tɜːn ə hɛə/
成语
面不改色, 不动声色, 毫不在乎
to show no sign of fear, surprise, or emotion in a difficult or alarming situation
示例:
•
Even when the car skidded, she did not turn a hair.
即使汽车打滑，她也面不改色。
•
He heard the bad news but did not turn a hair.
他听到了坏消息，但面不改色。