span length [建] 跨长 ; 跨间距离
critical span length 临界跨距
shear span length 剪跨长度
bridge span length 桥梁跨径
minimum span length 最小跨度
economy span length 经济档距
For instance some forms have fields that span a few rows and the length on each row can be different, which make it difficult to handle by standard reporting items.
例如某些表单的字段，跨越了几行，每行的长度也可能不尽相同，这使得标准的报表组件很难处理。
Therefore, the X-axis span should be divided into four equal segments of length=span/4.
所以，应该将 X 坐标轴的跨度分成 4 个相等的区段，每个区段的长度 = 跨度/4。
There is the danger that the high-speed connectivity of the Internet will reduce our attention span—that we will be incapable of reading anything of length or which requires deep concentration.
风险在于，互联网的高速连接会减少我们的注意力持续时间，从而导致我们不能阅读长篇论著，或是需要高度集中注意力的书籍。
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