对于为什么应该定时进行备份(并测试这些备份的可恢复性)，有很多的原因。

There are lots of reasons why you should run regular backups (and test their recoverability).

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通过测试不同密封胶样品在不同试验条件下的弹性恢复率，比较了它们的弹性恢复性能。

Test result indicates that silicone sealant has excellent elastic recovery under different conditions, and the two-component polysulfide sealant has relatively higher elastic recovery.

youdao

通过测试不同密封胶样品在不同试验条件下的弹性恢复率，比较了它们的弹性恢复性能。

Test result indicates that silicone sealant has excellent elastic recovery under different conditions, and the two-component polysulfide sealant has relatively higher elastic recovery.

youdao