Frontier trade
[经] 边境贸易
🧩 词语组成解析
trade
[tred]
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
All students without exception must take the English examination.
所有学生毫无例外地都必须参加英语考试。
What's the fare?
车费多少？
I'm really positive that this product has all the features you have always wanted.
我确信这种产品有各种你所要的款式。