Gerotor
内齿轮油泵
🗣️ 情景例句
Did you catch anything?
你钓到什么鱼没有？
Do you like hunting?
你喜欢打猎？
It looks a bit like a deer. There's its head and there are its feet.
它看起来有点像鹿，那是鹿头，那是鹿脚。