每天做约20分钟的健走活动。
水分子的氢氧健一秒钟之内就会发生万亿次的断裂和重组。
Inless than a trillionth of a second, water molecules are thought tofluctuate between the two states as the hydrogen bonds break and reform.
范健：设定暂停三十分钟，三十分钟你应该够了吧。
Fanjian: set pause to be thirty minutes. Thirty minutes should be enough for you.
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