1.a person's social heritage: previous experience or training;
he is a lawyer with a sports background
2.the part of a scene (or picture) that lies behind objects in the foreground;
he posed her against a background of rolling hills
3.information that is essential to understanding a situation or problem;
the embassy filled him in on the background of the incident
4.extraneous signals that can be confused with the phenomenon to be observed or measured;
they got a bad connection and could hardly hear one another over the background signals
5.relatively unimportant or inconspicuous accompanying situation;
when the rain came he could hear the sound of thunder in the background
6.the state of the environment in which a situation exists;
you can't do that in a university setting
7.(computer science) the area of the screen in graphical user interfaces against which icons and windows appear
8.scenery hung at back of stage
1.understate the importance or quality of;
he played down his royal ancestry
電腦服務(wù) 保留網(wǎng)絡(luò)帶寬,主要是自動更新吧,占用網(wǎng)資源 background 背景 (background) 屬性定義元素的背景效果 元素的背景區(qū)包括前景之下直到邊框邊界的所有空間。因此,內(nèi)容框與內(nèi)邊距都是元素背景的一部分,且邊框畫在背景上。 CSS 允許應(yīng)用純色作為背景,也允許使用背景圖像創(chuàng)建相當(dāng)復(fù)雜的效果;CSS 在這方面的能力遠(yuǎn)遠(yuǎn)在 HTML 之上。 background 是用于在一個聲明中設(shè)置所有背景屬性的一個簡寫屬性。 格式: background: {屬