And it turns out to be easier to study the behaviour of such fluids by looking at the barriers than at the bodies of fluid which those barriers separate.

要研究这一流动体的活动，通过观察其中的界限要比观察被界限切分出的群体容易的多。

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Petroleum and related products - Determination of the ageing behaviour of inhibited oils and fluids - TOST test - Part 2: procedure for category HFC hydraulic fluids.

石油和相关产品。防腐蚀油和液的老化性能测定。TOST试验。第2部分：HF C类液压液规程。

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Very important for the swelling behaviour Is the polar character of the water molecule. Experiments with nonpolar fluids like heptanor benzine showed no or only very small swelling.

同一岩样浸入极性和非极性的流体中，其膨胀性能是不同的，这与水分子的极化特性及其表面张力有关。

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In fact, the vortices were observed breaking themselves apart in a particular way, which will provide insights that could assist our understanding of turbulence, plasma physics, and even the general behaviour of fluids.

ENGADGET: Alt-week 3.9.13: Sunstones, knotted vortices and a zero-g robot