In the test program, we'll attach a wheel listener that has the background color loop through the array of colors based upon the direction, as shown in Listing 4.

在测试程序中，我们增加了一个鼠标滚轮侦听器，它让背景色按照某一方向在颜色数组中循环，如清单4所示。

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I knew some of it, but it has been interesting to do the background on it."

VOA: special.2010.06.28

And perhaps the explanation has got to be the ubiquity of death is this kind of background, constant hum.

也许应该这么解释，死亡的无处不在,是一种背景的，持续的嗡嗡声。

耶鲁公开课 - 死亡课程节选

So I don't know your mathematical background, but the textbook has an appendix, which is a reasonable measure of how much math you should know.

我不太清楚你们的数学功底,但教材上有附录,它能清楚地告诉你,你应该掌握多少数学

耶鲁公开课 - 基础物理课程节选

She has the background.

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The terminal which has been the background of dozens of Hollywood movies and television shows throughout the years, brought out several celebrities, including former Mets star Keith Hernandez and Grammy award singer Melissa Manchester to speak and perform.

CNN: STORY HIGHLIGHTS

Hennessy, a professor of electrical engineering and computer science with 23 years at Stanford, has the right background to figure out the university's new role.

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