把这一句，留给此刻的你
There are the further difficulties of building a population out of a diversity of races, each at a different stage of cultural evolution, some in need of restraint, many in need of protection; everywhere a bewildering Babel of tongues.
从不同的种族中建立一个人口群，每一个种族都处于不同的文化演变阶段，其中一些需要限制，许多需要保护，这还有进一步的困难;到处都是令人眼花缭乱的语言。