Never has learning been given to so many human beings. 从来没有过这么多人可以接受教育
How can this century carry the burden of nine billion human beings... 这个世纪怎么负起九十亿人的重压
Over one and a half billion human beings- 也就是超过15亿人类的经历
Is just a link in a chain of innumerable living beings... 只不过是四十亿年来 地球上接连出现的
it's something that is being caused by human beings. 而是人类造成的
is the key to beating human beings on their home turf. 才能在人类的地盘占上风
Four billion human beings now live in the urban environment. 四十亿人口现在居住在城市环境中
However, human beings are seldom the first to reach these black, damp places. 但是 人类绝非 这个阴暗潮湿地界的第一位到访者
Human beings venture into the highest parts of our planet at their peril. 人类总是愿意冒着生命危险 占领地球上最高的地方