生命安全

手机已成为我们生活的一部分，在教室里使用手机也变得更加可接受。智能手机变得流行时，它的大小和功能也不断得到改善，但电池却不能维持原来的状态。

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In American comic books, there are all kinds of superheroes. They live to protect people’s lives and keep the world in peace.

2017-12-14 6271 阅读

Though we are told that alcohol is dangerous, especially driving a car after drinking alcohol.

2014-04-25 7112 阅读