词汇	自由前进波
释义	自由前进波 free progressive wave
随便看	geographical entropy geographical envinonment geographicalenvironment geographical environment geographic al environment geographical environmental change geographical environmental elements geographical environmental theory geographical environment elements geographical environments geographical evidence geographical expedition geographical experiment geographical exploration in Africa geographical exploration traverse geographical expression geographical extent geographical extentof a beam of rays geographical factor geographicalfactors geographical factors geographical feature geographical feature is indicated geographical features geographical feedback