Get these concepts. It can be done.

要弄懂这些概念，这是能做到的。

youdao

To get full benefit from this tutorial, it is helpful but not necessary if you are familiar with these concepts and products

为了从这个教程中获得更全面的收益，如果您对以下这些概念和产品比较熟悉，那将一定会有所帮助，但这些并不是必须的

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Fortunately, concepts like extreme programming and agile development have made it possible to get a lot of these same benefits without an entire team of people whacking on your code.

所幸的是，由于极限编程和敏捷开发这些概念的出现，即使没有整个团队的人来锤炼代码，在很大程度上，您也能获得同样的收益。

youdao

for exam 2, you still need to know and understand everything you learned in exam 1, but you can put off learning it completely until we get through, at least, next Wednesday before we start maybe spending time on these concepts outside of class.

为了掌握第二次考试的内容，你仍然需要知道和理解,在第一次考试前所学的全部知识，但是你可以先放一放，等到我们进行到，至少在下周三我们可能开始不在课堂上,讲这些内容之前。

麻省理工公开课 - 化学原理课程节选