一个从8米处坠落，一个从2米处坠落，时间之差是它与高，之比的平方根。

If I drop one from eight meters and I drop another one from two meters then the difference in time will be the square root of the ratio.

youdao

此时程序的“实际执行时间”，即整体执行时间与等待用户响应时间之差，才能够真实地反映用户可察觉的系统处理能力。

So the subtraction of user input time from total time, namely the "real execution time", can truly reflect the user-perceived performance.

youdao

我的健康状况如此之差，以至于他们把我放到了等待移植名单的首位，但仍需一段时间来进行配型；有人从未获得过合适的移植器官。

I was in such bad health that they put me at the top of the waiting list, but it can still take ages to find a match; some people never do.

youdao