Computers built according to Morris's rule would not attempt to be utterly proof against cracker, but they would be impossible to enter without leaving the digital equivalent of fingerprints.

根据Morris规则构建的计算机不会试图成为针对黑客的完全证据，但他们将无法在不留下指纹的电子证据的时候进入系统。

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A simple experiment that sends photons through three slits provides the best proof yet of an important axiom of quantum theory called Born's rule, say physicists in Canada and Austria.

加拿大和奥地利的物理学家介绍，这个简单的实验通过三个缝发出光子，为量子理论的一个重要公理“波恩定则”提供了最好的证明。

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Sales: As a general rule, anyone who is a source of income for a company will be safe, so salespeople - especially in recession-proof industries - have little to worry about.

销售：一般来讲，任何人只要是公司的收入来源，他都会安全，所以销售人员——特别是在抗衰退行业——几乎不用担心。

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One basic rule for limit-making is that the burden of proof should fall on those who want change especially since the changers often want to keep on changing indefinitely: cutting the abortion limit by a fortnight was, for some, merely an interim goal on the way to a tighter squeeze or an outright ban.

ECONOMIST: Bagehot

As a rule of thumb, products that speak to basic needs are more recession proof.

FORBES: Is Your Marketing Ready for a Double Dip?

The best proof is that we now look back at both the Civil Rights Act of 1964 and the filibuster rule change of 1975 and wonder that they once seemed so impossible.

NPR: In Filibuster Fight, Both Parties Switch Stances