正文

VOA慢速英语:NASA Successfully Tests New Rocket Engine(翻译)

2016-07-03来源:VOA

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词汇讲解：

1. qualification n.资格，授权; 条件
例句：She passed her qualification for the Olympic gymnastic competition.
她获得了奥林匹克体操比赛的资格。

2. produce vt.产生; 生产; 制作
例句：Hard work and enthusiasm can produce success.
努力工作及热忱会导致成功。

3. certify vt.（尤指书面）证明; 发证书给…
例句：I certify (that) this is a true copy.
兹证明此文件为真正的誊本。