慢速英语:Learning First Aid: What to Do Until Medical Help Arrives

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例句：Our meeting was quite accidental.
      我们的相遇是很偶然的。

      We must never let any accidental success go to our heads.
     我们永远也不能让一时的成绩冲昏头脑。

2.expel vt. 驱逐,逐出,开除

例句：The whale expelled water from his blow hole.
       那鲸鱼从鼻孔喷出水来。

      The student was expelled for cheating.
      这个学生因作弊被开除。

3.abdominal a. 腹部的,腹式呼吸,开腹手术

例句：He has bouts of abdominal pain.
      他有一阵阵的肚痛。

4.unconscious a. 失去知觉的,不省人事的;无意识的,不知不觉的

例句：The injured man is unconscious but still alive.
      受伤的人不省人事但仍活着。

5.stoppage n. 中止;填塞;歇业;支付

例句：Delivery will be late because of stoppage on the production line.
       因生产线故障，交货要推迟。