Let the junction of the three fracture lines have a virtual displacement.
令三条折断线的相交处有一虚位移.
辞典例句
The virtual displacement is different from the real one during real motion.
虚位移与真正运动时发生的实位移不同.
互联网
The virtual displacement is an arbitrary one permitted by the constraints at a fixed time.
虚位移是在约束容许的条件下可能发生的.
互联网