keep a straight face
US /kiːp ə streɪt feɪs/
UK /kiːp ə streɪt feɪs/

成語
1.
保持嚴肅, 不笑
to succeed in not laughing or smiling
範例:
•
It was hard to keep a straight face when he told that ridiculous joke.
當他講那個荒謬的笑話時,很難保持嚴肅。
•
She tried to keep a straight face, but a giggle escaped.
她努力保持嚴肅,但還是忍不住笑出聲來。
在 Lingoland 學習這個單詞