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<!DOCTYPE html> <html> <head> <style> body { background-image: url('w3css.gif'); background-repeat: no-repeat; background-attachment: fixed; background-position: 50px 150px; } </style> </head> <body> <h1>background-position 属性</h1> <p>此处，背景图像位于距左侧 50 像素、距顶部 150 像素的位置。</p> </body> </html>