Pedipulator
步行機
??? 情景例句
He had an emergency.
他有緊急事情。
TV crazy
電視迷
Instruments have been devised and can be so placed that all three elements can be recorded in different graphs.
已經設計出了一些儀器，它按照一定的安放方式就可測繪出這三種運動的曲線圖。