现在从考察一无应力物体中的圆球形单元体开始讨论。

We begin by considering a spherical element in an unstressed body.

如果物体的角速度是改变的，就说这个物体具有角加速度。

If the angular velocity of a body changes, it is said to have an angular acceleration.

短声波即使遇到小物体都会产生回音。

Short sound waves bounce off even small objects.

月光下，我只能分辨出物体的轮廓。

By the light of the moon I could just make out shapes and outlines.

这种病症使患者难于看见视觉边缘的物体。

The condition makes it difficult for patients to see objects at the periphery of their vision.

X射线能够穿透很多物体。

X-rays can penetrate many objects

他认为婴儿几乎就是毫无生命的物体。

He thought of the baby almost as an inanimate object.

任何有较强重力的物体都会对其他物体产生引力。

Anything with strong gravity attracts other things to it.

它们也可用于工厂车间，用来焊接物体。

They will also be used on factory floors to weld things together

患健忘症的人不会忘记关于物体的一些基本知识。

People suffering from amnesia don't forget their general knowledge of objects.

当巨大物体撞击地球时，就会产生凹坑。

When a large object impacts the Earth, it makes a crater.

你的两张照片拍的都是静止物体。

Both your pictures are of static subjects.