Bivariants
双变式
🗣️ 情景例句
Yes. I'm sorry, but how do you spell your last name, sir?
好的，不过对不起，先生你的姓怎么拼？
Fish begins to stink at the head.
上梁不正下梁歪。
Unfortunately you'll have to pay the fine before you check those books out.
在你借书之前你要先付清罚款。