1. Dong is a plumber by trade.
   董的职业是管子工。
2. Trades at the local supermarket.
   经常上当地的超级市场购物
3. Tradesman engaged in retail trade.
   零售商从事零售贸易
4. The trade unions have thrown down the gauntlet.
   工会已经提出挑战。
5. Salesmen try to trade their customers up.
   销售员想说服顾客买更贵的东西。

　1个形容词解释