There are many detailed rules for everything from the color of the wrapping paper to the time of the gift presentation.

从包装纸的颜色到送礼物的时间，每件事都有许多详细的规定。

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This paper discussed the forming rules and their reaction activities of interhalogen compounds.

本文讨论了卤间化合物的形成规律及其反应活性。

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This year Japan's parliament is expected to relax the commercial paper rules.

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The paper helpfully explained the rules of such dramas.

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" Jonathan Donner, a researcher at Microsoft India who published a paper on "The Rules of Beeping, " said: "Beeping is simple: A person calls a mobile telephone number and then hangs up before the mobile's owner can pick up the call.

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