柯林斯英汉双解大词典
span /spæn/ CET4 TEM4 ( spanning, spanned, spans )
1.N-COUNT A span is the period of time between two dates or events during which something exists, functions, or happens. (两时间点之间的) 时间段
2.N-COUNT Your concentration span or your attention span is the length of time you are able to concentrate on something or be interested in it. (注意力的) 持续时间
3.V-T If something spans a long period of time, it lasts throughout that period of time or relates to that whole period of time. 持续 [no passive]
4.V-T If something spans a range of things, all those things are included in it. 包括 [no passive]
5.N-COUNT The span of something that extends or is spread out sideways is the total width of it from one end to the other. 宽距 [usu with supp]
6.N a team of horses or oxen, esp two matched animals 马队或牛队
7.V-T A bridge or other structure that spans something such as a river or a valley stretches right across it. 横跨[1]