Thehumannoseisanunderestimatedtool.Humansareoftenthoughttobeinsensitivesmellerscomparedwithanimals,butthisislargelybecause,unlikeanimals,westandupright.Thismeansthatournosesarelimittedtodetectingthosesmellswhichfloa

Question

The human nose is an underestimated tool.Humans are often thought to be insensitive smellers compared with animals,but this is largely because,unlike animals,we stand upright.This means that our noses are limitted to detecting those smells which float through the air,missing the majority of smells which stick to surfaces.In fact though,we are extremely sensitive to smells,even if we do not generally realize it.Our noses are capable of detecting human smells even when these are reduced to far below one part in one million.
“missing the majority of smells which stick to surfaces.
“.Our noses are capable of detecting human smells even when these are reduced to far below one part in one million”什么意思?

Answer 1

我们的鼻子限制于鉴别出那些漂浮在空气中的气味,失去了（闻不到）大多数的附着于地面上的气味.
我们的鼻子能够鉴别出人类的气味,即使是这些气味降低到远远低于百万分之一.