正文

VOA慢速英语:Researchers at Virginia Tech Test Drones for FAA Rules

2014-09-22来源:VOA

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词汇讲解：

1. assist vt.帮助; 援助
例句：His duty is to assist the aggrieved person inasmuch as he is able.
他的责任是尽他所能帮助受冤屈的人。

2. announce vt.宣布; 述说
例句：Please announce to the children that there will be no school this afternoon.
请通知孩子们今天下午不上课。

3. guarantee vt.保证，担保
例句：Will you guarantee us regular employment?
你愿意保证定期雇用我们吗?

4. examine vt.检查，调查
例句：The doctor examine the patient carfully.
医生对这位病人作了仔细检查。

5. improve vt.提高（土地、地产）的价值; 利用（机会）; 改善，改良
例句：Technical advances improve productivity.
技术进步提高生产力。