如果缺少关键的信息，那么必须反复研究、调整和测试代码，这个过程可能要重复许多次。
If you lack vital information, you must reinstrument your code, repeat your steps, and restart your investigation — a process that requires potentially numerous iterations.
你应将每个月的测试通过电子表格进行记录和管理，以避免无意中对同样元素进行反复、多次的重复测试(从而降低了效率)。
Every month you should track your results in a spreadsheet to avoid accidentally re-testing the same elements over and over again.
重复用自己的悲伤，和反复的音乐，他多次受伤，喜欢重演。
Repeat with their own grief, and repeated the music, his repeated injuries, likes to repeat itself.
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