它提供了额外的保护率，尤其是当流体变化间隔遗漏或在大量使用，即使在被滥用。

It provides an extra margin of protection, especially when fluid change intervals are missed or during heavy use; even during abuse.

youdao

这颗星星因为亮度变化比一般星星的变化间隔时间要长。周期持续整整2天零20个小时零49分钟。

This star is known to vary in brightness over a regular time interval. The cycle lasts exactly 2 days, 20 hours and 49 minutes.

youdao

因此，在固定时程与变化时程之间，以及在比率与间隔之间，存在着一些区别。

And so, there is the distinction between fixed schedules versus ratios, variable schedules and ratio versus interval.

youdao

And so, there is the distinction between fixed schedules versus ratios, variable schedules and ratio versus interval.

因此，在固定时程与变化时程之间,以及在比率与间隔之间，存在着一些区别。

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