They rest on their whole active surface and practically can not stand any pressure difference action.
他们依靠在他们的整个作用面上，并且实际不能承受任何压差作用。
On the surface, it bears all the marks of intelligent, purposeful, and free action.
从表面上看，这些行为带有理智的、有目的的、自由行为的所有标记。
High surface activity and good emulsifying action of such surfactants are found.
这类表面活性剂具有较低的表面张力和相当好的乳化性能。
Runway surface wet, braking action poor.
跑道湿，刹车效果差。
Runway surface wet, braking action poor.
跑道湿，刹车效果差。
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