Impellent
a. 強迫的, 推進的\\nn. 推進力
? 同義詞
??? 情景例句
Probably a lot of advertising and bills.
大概是一大堆廣告和帳單。
Thanks.
謝謝。
Imagine a pen attached to the weight in such a way that its point rests upon a piece of paper on the floor.
假定把一支筆拴在重物上，筆尖落在地板上的一張紙上，