?? 詞語組成解析
n. 商品( commodity的名詞復數 ); 農產品; 有價值的物品; 有用的東西
exchange
[?ks't?end?]
n. 交換;交易;交易所;兌換（率）;
vt. 交換，互換;兌換;交換，調換;
vi. 交換，替換;進行易貨貿易，作物物交換;[金融業]（貨幣）交換，兌換;
ex 表示\"出，出去\" + change交換，替換 → vt.交換；交流\r\nn.交換
??? 情景例句
You just earned your weight in gold, Malcolm.
你可幫了大忙， Malcolm。
Force can never destroy right.
暴力絕不能摧毀正義。
It took him some time to connect the long rubber pipe to the air supply pipe that ran round the port, but at last it was done and as a result work was able to progress much faster.
他花了不少時間把長長的橡膠管接到鋪設在碼頭周圍的空氣供應管上，最后他終于把它們連接起來，工作因而進展得更快。