a sort of race

The human race has almost all the tools it needs to continue leading much the sort of life it has been enjoying without causing a net increase in greenhouse-gas concentrations in the atmosphere.

人类几乎有了解决问题的所有手段，应当在不增加大气温室气体排放浓度的情况下，继续程度极高地过上人类正在享受的那种生活。

First it marked out a race-course, in a sort of circle, ('the exact shape doesn't matter, ' it said, ) and then all the party were placed along the course, here and there.

首先，它划出个比赛路线，有点像个圆圈，它说：“具体形状没关系的。”

No race has an advantage in swimming and there will likely be a limit to the time you can spend underwater without some sort of skill or potion.

没有任何一个种族在游泳方面有优势，而且很有可能，在没有任何技能或药水帮助的情况下，在水下停留会有时间限制。