请问background-position:left center；

请问background-position:left center； background. background CSS中的background和background-color的区别请问background中的color和background-color有什么区别吗?我觉得它俩的功能应该是一样的,请指教谢谢. background:light Background Extracting background是什么意思、 background-size background-position:bottom right请问这句话什么 意思?背景位置在下, background:url(http://www.vip400.cc/dede_admin_login/.png)请问是什么意思呢 请问下面这句话中by代表什么意思,it指代什么,There was no flinching and no thought of giving in; and by what seemed almost a miracle to those outside these Islands,though we ourselves never doubted it,we now find ourselves in a positio the background of name Project background是什么意思 under the background against a background of different background people solid background是什么意思 industry-background是什么意思