要重新计算特殊起始和终止时间的结果，您可以指定这个报告的具体时间段。

To recalculate results for particular start and stop times, you can specify a time range for a report.

youdao

记录用户使用服务xyz的起始时间。

Record user begin time for service xyz.

youdao

起始日期(以及可选的时间)。

Start date (and optionally time).

youdao

This is the starting speed, that's the rate at which it is gaining velocity, and that's how long it's been gaining it.

这是起始时的速度,这是速度的增长速率,这是加速的时间

耶鲁公开课 - 基础物理课程节选