中气层 zhōng qì céng

DEFINITIONS

  1. mesosphere
  2. upper atmosphere

CHARACTERS

中 zhōng
HSK 1
central; center, middle; in the midst of; hit (target); attain
气 qì
HSK 1
steam, vapor; KangXi radical 84
层 céng
HSK 3
story, layer, floor, stratum