机译:(CO)-C-13, (CO)-O-18, and CS observations toward massive dense cores
Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China;
ISM : clouds; ISM : molecules; stars : formation; H-II REGIONS; ULTRACOMPACT HII-REGIONS; LUMINOUS IRAS SOURCES; SOUTHERN H2O MASERS; STAR-FORMATION; MOLECULAR CORES; PROTOSTELLAR CANDIDATES; CARBON-MONOXIDE; POINT SOURCES; CLOUD MASSES;