以色列第一架探索月球的飞船

词汇讲解：

1. keen adj. 热衷的, 热心的,热切的, 渴望(做某事)
例句：The parents were keen that their daughter should become musician.
父母渴望他们的女儿成为音乐家。

2. unveil vt. 使公之于众;揭露
例句：The plan was unveiled with the approval from the Minister.
经部长同意该计划被公之于众。

3. purpose n. 目的; 意图
例句：What is the purpose of his visit?
他来访的目的是什么?

4. weigh link v.重达
例句：This marble ramp weighs one ton.
这个大理石台阶重一吨。

5. competition n. 比赛；竞争
例句：There is keen competition between the two motorcar firms.
两家汽车公司之间存在着激烈的竞争。

6. represent vt.表现, 描绘；代表, 象征, 表示；作为…的代表
例句：The Foreign Minister represented the country at the conference.
外交部长代表该国出席大会。

7. orbit n. 轨道
例句：They put a weather satellite into orbit round the earth.
他们把一颗气象卫星送入环绕地球的轨道。

8. prove vt. 证明
例句：They were not able to prove these suspicions.
这些怀疑他们无法证实。

9. expertise n. 专门知识或技能
例句：We were amazed at his expertise on the ski slopes.
他斜坡滑雪的技能使我们赞叹不已。

10. potential n. 潜力, 潜势, 可能性
例句：This new invention has an enormous sales potential.
这项新发明有巨大的销售潜力。