This is followed, over time, by a permanent elongation of the eye.
时间一久，随之而来的是视力永久的伸长。
As this toughened internal stress is a kind of permanent stress, it can not produce the internal stress attenuation with elongation of the product service time.
由于这种钢化内应力是一种永久应力，随着产品运行时间的延伸，它不会产生内应力衰减现象。
A distinction is made between elongation and break, permanent elongation and elastic elongation.
这样就构成了拉伸与崩断以及永恒延伸和弹性延伸的区别。
A distinction is made between elongation and break, permanent elongation and elastic elongation.
这样就构成了拉伸与崩断以及永恒延伸和弹性延伸的区别。
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