1.countdown n.倒计数

例句：The director began the countdown ten seconds before the broadcast.
       距离开播还有十秒，导播开始倒读数。

2.countless a.数不尽的, 无数的

例句：There are countless cultural and ethnic ties between these two countries.
      这两个国家的文化和种族上有着千丝万缕的联系。

3.loosely ad.松弛地, 宽松地, 不紧

例句：The article is loosely organized.
      文章结构松散。

4.voyage n.航行, 航海, 航程, 旅行, 航空

例句：At the time, Columbus was a young sailor on this first sea voyage.
       哥伦布第一次航海时，仅是个年轻的水手。

5.splash v.溅湿, 溅开, 飞溅

例句：The "Deep Impact" made the powdery fragments on the surface of the comet nucleus splash in all directions.
      “深度撞击”使彗核表面的细粉状碎屑四处飞溅。

1.One hundred forty meters from the surface, the astronauts took control of the lander from the computer.

take control of 控制

例句：There must be someone who can take control of these naughty children.
      应该有人能管住这些淘气的孩子。

2. But the man who was closest to what was happening, Michael Collins, could only listen.

what was happening这一句是宾语从句，是介词to的宾语。
who was closest是定语从句，修饰the man。

3.He left the cold, black shadow of the lander and stepped into the blinding white light of the sun.

step into步入，走进

例句：She has just graduated from college, and is going to step into the society soon.
      她已经大学毕业，就要步入社会。