the mesosphere
noun[S]
environmentspecializeduk/ˈmes.əʊ.sfɪər/us/ˈmez.oʊ.sfɪr/thelayerofgasessurroundingtheearthat aheightof between 50 and 100kilometres
散逸层(离地球表面50至100公里的大气层的一部分)
Compare
the exosphere
the ionosphere
the stratosphere
the thermosphere
the troposphere