If the text is light colored then the background has to be dark and vice a versa.

如果文字是亮色的，那么背景就必须为暗色，反之亦然。

youdao

This research report under the background has been completed after three months work.

这份调查报告在此背景下。历时三个月完成。

youdao

The paint structure contains a rect data structure that has the smallest rectangle that completely encloses the update region and a flag that specifies whether the background has been erased.

绘图结构中包含了一个RECT数据结构，它包含了完全封闭更新区域的最小矩形以及一个标志，指明背景是否需要擦除。

youdao

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

Last year marked the highest number of background checks the FBI has run since starting the program - more than 19.5 million.

WSJ: Gun business soars after NY gun laws enacted

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

But the company has just released the background method for its news feed update.

FORBES: On News Feed, Facebook Shows Off A Bit of Petticoat