只要它们以向心方向保持足够迅速的移动，它们就拥有活的形体，但是随着它们倒转，向外以离心方向运动，它们就丧失了形体。

As long as they move fast enough in a centripetal direction, they have living bodies, but as they reverse to the outward, centrifugal direction, they lose their bodies.

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试样内部各部位的应力大小分布不均匀，随应变速率的增大，最小应力值由自由变形的鼓形区域逐步向心部移动；

The effective stress of specimen is inhomogeneous. As the strain rate increases, the minimum stress value moves from the drum-shaped region to the heart of specimen.

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