Some see evidence of man reaching a physical limit (at least without illegal doping).

一些人认为人类已经要达到极限了(起码在没服过违禁药品情况下)。

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Best Practice: When executing rules, if the memory usage of InfoSphere DataStage is close to the physical limit of the system, then reduce the number of logical nodes.

最佳实践：当执行规则时，如果InfoSphere DataStage的内存使用量与系统的物理限制接近，那么，可以减少逻辑节点的数量。

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An obvious solution is to use a processor with a faster clock rate, but for any given technology there exists a physical limit where the clock simply can't go any faster.

一个明显的解决方案是使用具有更快时钟频率的处理器，但是对于任何特定技术来讲都存在一个物理极限，时钟频率也有这样的极限。

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The National Association for Sport and Physical Education says twenty to thirty students in a P.E.class should be the limit.

VOA: special.2009.08.06

The wireless subwoofer also features patented Philips DoubleBASS technology to generate a deep and powerful bass performance and giving the perception of offering bass notes below the physical limit of the speaker.

ENGADGET: blogger-avatar

That may be slightly bearish for the gold market as it could limit physical buying interest this week, due to demand from China slowing during its holiday season.

FORBES: A.M. Kitco Metals Roundup: Gold Solidly Lower, Hits 5-Week Low, on Fresh Technical Selling

Leg pain, in turn, can cause people to limit their physical activity, posing a threat to their overall physical health.

WSJ: New Tactics to Treat Artery Disease That Harms Legs