n. 交通,運輸量;(非法的)交易;通信量;交際;
vt. 用…作交換;在…通行;
vi. 交易;買賣;
??? 情景例句
She has the ability to keep calm in an emergency.
她有處變不驚的本事。
To read only the good news
只看好消息
As a shipbuilder, Cockerell was trying to find a solution to the problem of the wave resistance which wastes a good deal of a surface ship's power and limits its speed.