by the time + 从句（一般现在时），主句（将来完成时） 例，Your character will have been completed by the time your life comes to an end. 当生命走到尽头的时候，你的人格才变得完全。 … The phrases "at this time" and "in this time" have slightly different meanings. "At this time" usually refers to a specific moment or point in time. For example, if someone asks, "Can we meet for … · 按照 宋永端 教授团队综述的说法 [1]，predefined time预定的是收敛的时间上界而prescribed time预定的直接是收敛时间。 类似地，还有 finite-time 和 fixed-time 的说法，按照宋老 …
