“质心”造句

它绕着质心的椭园运动就几乎看不出来.
Its own elliptic motion around it will be almost imperceptible.

在无外力时,质心的速度是常量.
The velocity of the center of mass is constant in the absence of external forces.

错误的根源在于混淆了质心与重心 吗 ?
Do We Mistake Center of Mass Center of Gravity?

• #质心