A substance that's not quite liquid or gas, known as supercritical fluid.

一种既液也气物质， 称为超临界流。

It's important to note that fluid ounces measure volume, not weight, unlike the regular ounce.

需要注意，流盎司积，重，这与常规盎司同。

At this point,   the principles defining crowd movement are closer to fluid dynamics than anything else.

此时，定义人群移动原则更接近流力学其他任何东西。

This fire is not burning the ground fuels themselves like the litter or organic material in the soil but just on the surface, it's the movement of a fluid.

这种火像垃圾或土壤中有机物质那样燃烧地面燃料本身，仅仅在表面上，这流运动。