求一句英文翻译，我怎么翻也翻不通顺，求大神们指点指点。

Irrespective of how suspicious the drivers behind the ongoing surge of US shares are, given the increasing uncertainty over global economic growth, the rising tide has helped, if not all, the most valuable boats to sail to safer waters.

Personally I doubt if a carefully taken census would reveal that number.[43] Certainly the aboriginal population is steadily diminishing

文呢？

什么啊