Bialternant
[数]双交替式
🗣️ 情景例句
I'd like to see your work.
我希望能看到你的作品。
I know the boy whose father is a medical doctor.
我知道那个男孩的父亲是医师。
Often a valley boasted no inn at all, and climbers found shelter wherever they could --
山谷里常常没有小客栈，登山者只好随遇而安。