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
Please, sit down.
请坐。
On a crowded train, one comes in contact with many people.
在拥挤的火车里面,会和许多人接触。
One night, the gaoler decided to play a joke on his colleague to find out if, after so many performances, he had managed to learn the contents of the letter by heart.