VOA慢速英语:Cliffhanger: Rock Climbing as Sport and Art

例句：The missile curved gracefully towards its target.
      导弹呈优美的曲线状飞向目标。

2.harness n.（防止坠落或摔倒的）背带，保护带

3.stretch n.延伸

例句：The road stretches uphill at a steep slope.
      这条路以陡峭的坡度向山上延伸。

      The bird stretched its wings.
      鸟展开了翅膀。

4.overestimate vt.对(数量)估计过高;对…作过高的评价

例句：We overestimated the bill.
       我们对账单涉及的钱数估计多了。
 
      I think you’re overestimating his abilities.
      我看你对他的能力评价过高。

5.underestimate vt.对…估计不足, 低估

例句：I underestimate the distance, and am exhausted.
      没想到这么远, 我可累坏了。

      Do not underestimate the significance of nuclear power.
      不要低估核能的重要性。

6.continual adj.不间断的, 不停的

例句：I am tired of this continual rain.
      不停的下雨使我厌倦。

      Church Street is continual with High Street.
      教堂街与高街相连。