The absence of oxygen on other planets means that those planets lack an ozone shield to protect life forms against UV radiation.

其他行星上没有氧气，这意味着这些行星缺乏保护生命体免受紫外线辐射的臭氧层。

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The absence of an oxygen atmosphere on Mars and other planets in our solar system means that these planets also lack an ozone shield that would protect surface-dwelling life from UV radiation.

在火星和我们太阳系的其他行星上没有氧气，这意味着这些行星也缺乏保护地表生物免受紫外线辐射的臭氧层。

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He pointed to the new "Legend of Zelda" game, in which the Wii controllers are swung about in real life and appear as a sword and shield within the game, as evidence of this.

为论证这一观点，他提到了新《塞尔达传说》(Legend of Zelda)游戏。游戏中Wii玩家在现实世界中挥动手臂，其在游戏中的化身则随之挥动剑和盾。

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Talibah was a project manager at the life insurance subsidiary of Blue Shield of California in San Francisco.

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Still, doubts that this will offer much of a shield under real-life conditions lead to grousing.

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Even more important than rolling and dodging, a shield can mean the difference between life and sudden, merciless death.

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