One of the concerns out of the gate for students in this course, particularly those we dub less comfortable is that you're already starting off at a disadvantage.

另外一个比较关心的是,还没有入门的同学，尤其是那些有点跟不上的同学,你们的学习处于劣势。

哈佛公开课 - 计算机科学课程节选

It's simply material found on page fifteen of your textbook but let's review it. We say this is a beginning course so we assume no previous knowledge.

这是你们教材十五页上的一些简单材料,我们复习一下,我们说这是个入门课程,所以假设之前你们没有任何相关知识

耶鲁公开课 - 聆听音乐课程节选