慢速英语:Fish Production Needs Double to Meet Growing Global Demand

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1. produce vt. 生产; 产生
例句：Will the ocean produce less oxygen?
海洋会排放出更少的氧气么？

2. operate vt. 运转; 操作
例句：You operate it from your couch.
你用遥控器操作它。

3. profitable adj.有利可图的，有益的
例句：The business was tremendously profitable.
这种生意实在是有利可图。

4. harmful adj.对…有害的; 能造成损害的
例句：Freezing winter is harmful to orange trees. 
冰冻天气对桔子树是有害的。 

5. improvement n.改进，改善
例句：Despite all the improvement, rubber still has a number of bad outs. 
虽然橡胶已有许多改进，但它仍有许多缺点。