Substitution support has been enhanced to support a new pattern: a temporary absence defined by a time interval.

替换支持已经得到增强，可以支持一个新模式：按时间间隔定义的临时缺席。

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A table that includes temporal data has a pair of date-time columns that indicate the period (the time interval) when the row is valid.

包含时态数据的表有两个日期-时间列，它们表明每一行有效的期限(时间间隔)。

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Interval sessions can be short, making them a boon for anyone who feels that he or she never has enough time to exercise.

间歇性训练的时间可以很短，适合任何感觉自己永远没有足够时间锻炼的人。

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Ultimately, the proliferation of interval training and other high-intensity protocols has saved a lot of time and burned a lot of fat for fitness enthusiasts worldwide.

FORBES: How Short And Intense Workouts Changed Fitness For Everyone