n. 贸易;行业;<美>顾客;买卖;
vt.& vi. 交易,经商;
vt. 交换;经营…交易,做…的买卖;
vi. 贸易;买卖;以物易物;
🗣️ 情景例句
Dad ... Robbie. When did you come?
爸爸……Robbie。你们什么时候来的?
I got your back.
放心!
In their efforts to persuade us to buy this or that product, advertisers have made a close study of human nature and have classified all our little weaknesses.