These are two CSS classes, separated by a comma, with different background colors.

这些是两个css类，由一个逗号分开，有不同的背景颜色。

youdao

The example displays different types of templates with different background colors.

该示例显示具有不同背景色的不同类型的模板。

youdao

Living the house is really very sociable, you make friends with different people with different background.

住在 学校 宿舍很能锻炼人的社交能力，你可与各种不同背景的人交往。

youdao

After all, it is easier to begin a conversation with someone with a different background sitting behind a computer screen.

FORBES: Social Cause Social Media: Silver Bullet or Spam?

What I most enjoy about working with children is being able to make a contribution to people with a very different background than mine.

FORBES: Acing the Only Three True Job Interview Questions

Imagine having a group of display cubes when it comes time to plan the seating chart for a reception -- each cube could represent one individual, with a color-coded background and a name or photo up top, with different descriptive elements on each side.

ENGADGET: OLED Display Blocks pack six 128 x 128 panels, we go hands-on at MIT (video)