life - span
英
美
- life n.一生；生命；生活；人生
- span n.时期；跨度；间距vt.延续；横跨；贯穿；遍及；弥补动词spin的过去式形式.
名词 lifespan:
-
the period during which something is functional (as between birth and death)
- The machine's life is very long.
这机器使用寿命很长。
- Women have a higher life expectancy than men.
女人比男人的预期寿命长。
