我们的生活离不开空气，它的作用与特性紧密相关。
Air supports our lives and its USES are related to its properties.
如果你觉得你的生活已经离不开它了那就更糟了所以，当我们在使用网络的时候一定要小心。
It will be even worse if you feel you can't live without Internet. So we must be careful when we use the Internet.
如果你觉得你的生活已经离不开它了那就更糟了所以，当我们在使用网络的时候一定要小心。
It will be even worse if you feel you can't live without Internet. So we must be careful when we use the Internet.
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