每日商務英語 第460期:出爾反爾

to blow hot and cold 出爾反爾（成語）

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英文釋義

(IDIOM) To vacillate; to change one's opinion in a weak, indecisive way.

例句

The boss often blows hot and cold, depending on his mood, and so no one can predict his decisions on anything.

這位老闆總是出爾反爾，一切取決於他的情緒，所以沒人能預測他的任何決定。