study of the mechanical properties of fluids that are not in motion
hydrostatics详细解释
hy.dro.stat.ics n.(used with a sing. verb)Abbr. hyd.（名词）（与单数动词连用）缩写 hyd.The branch of physics that deals with fluids at rest and under pressure.流体静力学：物理学的一个分支，研究静止压力下的液体
