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1. plummet vi.垂直落下; 骤然跌落
例句：The action caused the value of our stock to plummet, and it is still out of favour with investors.
这一行动造成本公司股票价格剧跌，使投资者无意问津。

2. provoke vt.煽动; 激起，挑起
例句：Don't provoke or tease the animals in the cage.
不要触怒或刺激在笼中的动物。

3. broadcast vt.广播; 播放; 使广为人知
例句：The concert was broadcast by relay.
这场音乐会是实况转播的。

4. solute n.溶解物，溶质
例句：This solute will be referred to as a tracer.
这种溶质称为示踪剂。

5. urge vt.催促; 推进，驱策
例句：Many physicians urge aerobic exercise.
很多医生鼓励户外活动。

6. seal vt.密封; 盖章; 决定
例句：Cook the meat quickly at first to seal in the juices.
肉先快煮,可保存肉汁。

7. oppose vt.抵制; 反对，抗争
例句：Father does not oppose the idea at all.
父亲丝毫不反对这个想法。