It was shown that the laws of points won and lost of serve, blocking and counter attack under the old rule still play an important role in the new rule.

结果表明，发球得分制下发球、拦网、防反等得失分规律在每球得分制规则下仍发挥着作用。

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Because it is peer to peer and uses an encryption scheme it is very hard to write a simple rule for blocking it.

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However, the FTC did rule that Google must stop blocking the use of standard essential patents by competitors.

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An anti-collusion rule forbids participants from strategizing together and blocking less experienced players.

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