Premaxilla
n. 前颚骨\\n[医] 切牙骨, 门齿骨
🗣️ 情景例句
We were very young.
我们那时很年轻。
A fall into the pit, a gain in your wit.
吃一堑，长一智。
There were twenty cars in the race.
参加比赛的有20辆汽车。