"Well, error is contagious, " said the congressman with great goodnature, "and it knows no boundaries.

“可是错误是有传染性的，”这位仪员非常温和地说，“并且是不分国界的。”

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Love knows no boundaries, it is a creative and selfless like art.

爱没有国界，它是一个创造性和无私的艺术。

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Friendship knows no boundaries; therefore it is the real, true propagator of peace.

友谊无界限，因为它是真正和平的传播者。

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It knows no sectional boundaries or ethnic and racial divisions, and it crosses political party lines.

CNN: Inaugural Address

Optimism clearly knows no international boundaries either because it is not just dot.com domains that people were looking to make a fortune with.

BBC: Jumble sale for internet dreams