jìng / lì / xué / zhǔ / yào / yán / jiū / wù / tǐ / zài / lì / de / zuò / yòng / xià / bǎo / chí / píng / héng / de / tiáo / jiàn

静力学主要研究物体在力的作用下保持平衡的条件。

Statics mainly studies the conditions under which objects remain in equilibrium.