起点即是终点，终点亦是起点，周而复始，循环反复。

The origin is the end, and the end is the origin. It is a circle.

youdao

优化应该主要针对程序中最经常运行的部分，尤其是被内部循环反复调用的函数。

The optimizations should be done on those parts of the program that are run the most, especially those methods which are called repeatedly by various inner loops that the program can have.

youdao

我经常玩着玩着就电脑椅上睡着了，然后几个小时候醒来继续游戏，如此循环反复。

Often times I would fall asleep in my chair in front of my computer with EverQuest running, waking up hours later to start the cycle all over again.

youdao

It's phosphate, carbon, carbon, carbon, phosphate, carbon, carbon, carbon, phosphate and it has this structure hanging off the side.

就是磷酸基与戊糖的碳反复连接,如此循环往复,这种结构构成了主链的一边

耶鲁公开课 - 生物医学工程探索课程节选