He tells these teenagers the key to being an astronaut is having a solid background in math and science.

VOA: standard.2010.02.02

So generally and those of you coming from high school computer science background probably used An Integrated Development Environment which actually is a gooey with menus and icons and such.

对于你们这些,有着高中电脑知识背景的同学可能一般用,即“集成开发环境“,它有一些菜单，图标等等。

哈佛公开课 - 计算机科学课程节选

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

In the backdrop, in the background, of that expression, "struggle for science," there are two key figures.

为科学而斗争，这个表达的背景中“,有两个关键的人物。

耶鲁公开课 - 文学理论导论课程节选

Okay. I didn't see computer science in his background.

在他的知识背景中并没有计算机科学。

哈佛公开课 - 计算机科学课程节选