"Even among those with no history of major depression prior to their injury, of depression in the year following their injury."

VOA: standard.2010.05.25

The chart you see here suggests that 72% of last year's students had zero prior computer science background.

这个图表显示的是%,去年修这门课的学生中,72％的人没有计算机方面的专业知识背景。

哈佛公开课 - 计算机科学课程节选