Out of a clear sky there were enemies all around them.
突然间，他们的周围全是敌人。
Out of a Clear Sky
原声例句
正音：美语发音基础教程
The Adventures of Tom Sawyer
This was a thunderbolt out of a clear sky.
这是晴天霹雳。
美丽与毁灭（上）
And then out of a clear sky one day she informed her mother that undergraduates wearied her.
然后有一天， 在晴朗的天空中， 她告诉她的母亲， 本科生让她厌倦了。
英语百科
Out of a Clear Sky
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Out of a Clear Sky is a lost 1918 American silent romance drama film starring Marguerite Clark and directed by Marshall Neilan. Based upon a novel by Maria Thompson Daviess, Famous Players-Lasky produced the film and Paramount Pictures distributed.