different
mouth
same
voice
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→yi4kou3tong2sheng1 • yìkǒutóngshēng
in unison
with one voice, different mouths same voice
大家 異口同聲 地 稱讚 他 的 表現。
Everyone praised his performance in unison.
孩子們 異口同聲 地 說 "是的!"。
The children said "Yes!" in unison.
觀眾 異口同聲 地 喊 了 出來。
The audience shouted out in unison.