exosphere的意思？

exosphere的音标：exosphere的英式发音音标为：['eksəʊsfɪə(r)]exosphere的美式发音音标为：['eksoʊsfɪr]...

Last is the exosphere, which is outermost layer of the atmosphere.最后是散逸层, 这是大气的最外层.This region is called exosphere.这层大气称为外逸层.Above the troposphere is the stratosphere, followed by the ionosphere and capped by the exosphe...