If a humanyear really were equivalent to seven dog years, then people would reach reproductive age by seven, and some would live past 150.
如果狗活一年相当于人活七年，那么人七岁就该进入生育年龄，而一些人甚至有可能会活过150岁。
2
Over the past year, the human voice has helped guide us over the ups and downs of what was certainly a stormy time.
在过去的一年里，人类的声音帮助我们度过了暴风雨时期的起起落落。
3
The idea is that around the year 1800 CE the human population became large enough, around a billion people, that its activities started altering the environment.