Gerotor
内齿轮油泵
🗣️ 情景例句
I understood everything the minute I saw her face.
我一看见她的面孔，就明白了一切。
If at first you don't succeed, try, try again.
初试不成功，努力勿懈怠。
Von Frisch wanted to find out whether the dance told them how far away the feeding place was.
冯·弗里施想弄清舞蹈是否告诉它们离喂食点有多远。