摘要
CHILE Radio telecope antennas of the Atacama Large Millimeter/Submillimeter Array （ALMA）project stand in north Chile＇s Atacama Desert on March 12.The ALMA.which went online the next day,is the largest astronomical project in the world GERMANY A girl jumps in a snowy schoolyard in Essen,westem Germany,on March 12.Winter retumed to wide parts of the country,bringing snow and cold temperatures that caused traffic chaos
