span

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

The batteries had a life span of six hours. 电池的使用寿命是6小时。

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

His ability to absorb information was astonishing, but his concentration span was short. 他吸收信息的能力让人惊讶，但他的注意力持续时间很短。

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]

His professional career spanned 16 years. 他的职业生涯持续了16年。

4. V-T If something spans a range of things, all those things are included in it. 包括[no passive]

Bernstein's compositions spanned all aspects of music, from symphonies to musicals. 伯恩斯坦创作的乐曲包括了音乐的所有方面，从交响乐到音乐剧。

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]

It is a very pretty butterfly, with a 2 inch wing span. 它是一只非常漂亮的蝴蝶，翅膀张开有2英寸宽。

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

Travellers get from one side to the other by walking across a footbridge that spans a little stream. 旅游者通过一座横跨小溪的人行桥从一边走到另一边。