Servogear
伺服机构
🗣️ 情景例句
Small world. I'm from Titusville, too.
世界真小。我也是从Titusville来的。
Beard the lion in his den.
老虎头上捉虱；太岁头上动土。
Ducks know how to swim when they are born.
鸭子天生会游泳