“单元体”造句

画出此单元体,将应力标在其上.
Draw a view of this element with the stress placed thereon.

在B处的单元体,弯曲应力为零.
The bending stress is zero for the element at B.

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.