Predentary
前齿骨的
🗣️ 情景例句
I have to turn off the lights,
我得关掉灯，
You'll burt yourself, if you don't take care.
你不专心的话，就会烧到你自己。
the varieties are infinite; but two classes may be roughly seen.
鸟的飞行方式千差万别，但大体上可分为两类。