If you had one negative number in it, then the product would be a negative number and, if you took a root of that, then you might get an imaginary number.

如果这当中有一个负数,乘积就会变成负的,如果你对一个负数开根号,你就会得到一个虚数

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Each student goes to the law school's Web site, enters an ID and PIN number, and receives 60 imaginary points to bid on the courses he or she wants to take.

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He came up with the 80m figure by multiplying the number of dots, or pixels, in a high-resolution image (about 1m-2m) by the number of surfaces that an imaginary ray of light corresponding to each pixel would encounter as it bounced around a complex scene (say, 50-100).

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Then make an imaginary calculation of the number of times people watched the videos created by OfficeMax and JibJab.com.

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