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

And I mentioned on Wednesday that computer scientists do 1 in fact start counting from zero not one.

在星期三，我曾经提到过计算机专家,从0开始计数而不是。

哈佛公开课 - 计算机科学课程节选

Only the operating system has controlling of byte zero NULL in the computer's RAM and so if a function ever returns null, aka zero, well, something must have gone wrong because that can't possibly belong to me that memory because by human convention zero is owned by the operating system; not by a program I wrote.

只用操作系统在内存中能够控制,字节0，并且如果一个函数返回，或者说0，好的，可能出错了,因为那可能是不属于我的内存,因为惯例上，0是由操作系统拥有的,而不是由我的程序拥有的。

哈佛公开课 - 计算机科学课程节选

This motionlessness lets the computer reset to zero, so the accumulated errors can be reduced.

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"As you add scale, your incremental cost goes to zero, " says Robert Greifeld, 51, a former computer salesman who took over at Nasdaq in 2003 as it was being spun out of the old National Association of Securities Dealers, now the Financial Industry Regulatory Authority.

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