When someone ruins the fun, he always does so by refusing to play by the rules.

若有人破坏(败坏)了游戏的乐趣，通常是因为他拒绝按规则进行(那一定是他在玩时不遵守游戏规则所致)。

youdao

When the player ruins the fun, he always does so by refusing to play by the rules.

当玩游戏的人拒绝遵守规则时，游戏也就无乐趣可言。

youdao

There is evidence, however, that Castro is persuading at least some black market operators to play by the rules and pay taxes.

但有证据表明卡斯特罗正在说服至少部分黑市运营者依法运作并纳税。

youdao

O. means that Russia will have to play by the rules or face enforcement actions.

WHITEHOUSE: The White House

Wrongdoing executives also need timeouts when their companies fail to play by the rules.

FORBES: Five Lessons Corporations Can Learn From the Westminster Dog Show

Minnesota should respond by telling Mr. Franken that even a celebrity has to play by the rules.

WSJ: Al Franken's Minnesota