Economically active population in agriculture

• 参加农业经济活动的人口平均寿命；概率寿命；预期寿命

Economically active population in agriculture的用法和样例：

例句

1. This is due in part to increased life expectancy.
   这部分原因是人的预期寿命增加了。
2. Find the expected life of the part in cycles.
   求零件的预期寿命的循环数。