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

一种既不是液也不是气的物质， 称为超临界。

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

需要注意的是，盎司衡量的是积，而不是重量，这与常规盎司不同。

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

，义人群移动的原则更接近力学而不是其他任何东西。

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.

这种火不是像垃圾或土壤中的有机物质那样燃烧地面燃料本身，而是仅仅在表面上，这是的运动。