my $berbuf = pack( 'w*', 1, 128, 128+1, 128*128+127 ); 长度与宽度(Length and Width) 字串长度(String Length) 在传送网路资料时，往往需要将资料的长度放在封包的标头处，让对方Server知道后续还有多少资料需要处理...
基于68个网页-相关网页
如果你知道长度与宽度，面积很容易计算出来。
The area can easily be worked out if you know the length and the breadth.
产品规格可根据客户要求订制，杀菌箱体、冷却箱体长度与宽度可任意选定。
Product specifications can be customized according to customer requirements, sterilization cabinet, cooling box body length and width can be chosen freely.
这种想法并不正确，长度与宽度元素只是帮助浏览器计算图片所占用的空间，以提高网页下载速度。
Wrong. The width and height elements are to allow the browser to calculate how much space to allocate for an image. This helps the page load faster.
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