The Martian atmosphere contains only tiny amounts of water.火星的大气层中只含有极少量的水。The similarities between Mars and Earth were enough to keep alive hopes of some form of Martian life.火星与地球有很多相似之处,这足以让人们始终相信火星上存在某种生命。The Martian atmosphere contains only tiny amounts of water.火星大气层只含有微量的水。