human average life

For example, the average duration of human life has hardly changed in thousands of years.

例如，人类的平均寿命在几千年里几乎没有改变。

Of things turning out contrary to one's wishes, another can be added: a great invention in medicine leads to a sharp increase in the average span of human life.

例：关于事与愿违的实例除了……以外，不妨再举一个：一项伟大的医药发明大大延长了人们的寿命。

Even in the EU, average life expectancy is 8.6 months lower due to exposure to PM2.5 produced by human activities.

即便在欧盟国家中，由于暴露于人类活动产生的PM 2.5，人均期望寿命也减少8.6个月。