As a general rule, it doesn't exist until you observe it.

一般规律上，在你观察它之前它并不存在。

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Therefore a good rule to observe with regards eating a particular food is not to eat too much, too frequently.

因此，一个良好的饮食方法是：一种特定的食品不要吃太多，或过于频繁。

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Article 43 When deliberating a case, a collegial panel shall observe the rule of majority.

第四十三条合议庭评议案件，实行少数服从多数的原则。

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