利用临界流速公式系统地分析和讨论扭转刚度、重力系数和轴向预紧力对管道临界流速的影响特性。

The effect of some parameters of the system on the values of critical flow velocity is discussed according to the analytical expressions derived.

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目前，准确地辨别这些萧条时期如何影响社会特性是更困难的。

More difficult, in the moment, is discerning precisely how these lean times are affecting society's character.

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由于树种具有不同的、往往是独特的特性，森林物种组成的变化以多种方式影响着生态系统。

Shifts in forest species composition ramify through the ecosystem in many ways because tree species have different, often unique properties.

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Now that's pretty far fetched and not many people would say that a pop tart should be a controlled substance and regulated by government, but there are some very interesting chemical properties associated with foods like this that trigger things going on in the brain that affect us in a very big way.

这多少有点牵强,而且也没有很多人会认为,这种果酱馅饼应归为管制品,并受到政府监管,但有趣的是这种食品,确实有一些特别的化学特性,它会作用于大脑并会对我们产生大的影响

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选