However if you mention the width and height of the image, browser can know exactly how much space should it allocate for particular image, and even before the image loads it can allocate this space to it and continue loading the rest of the page.

• 然而，如果设置了图片的长度和宽度，浏览器就可以了解图片的存储空间，会在下载以前分配图片的空间，然后继续下载网页的其它部分。