everyone says so; in one voice ? 殺傷疾患，十室九空。百姓怨嗟，～。(韓愈《黃家賊事宜狀》) Even the sick people were killed and the slaughter stripped nine houses out of ten bare. The common people sighed and complained in one voice.
如出一口rú chū yī kǒu
就像從一張嘴里說出來的一樣。形容眾口同聲，說法一樣。everyone says so, in one voice, All say the same thing.