Every year on the 23rd of March, the World Meteorological Organization (WMO) celebrates World Meteorological Day (WMD). This is the date in 1950 that the WMO was created. A year later, it became a specialized agency of the United Nations to observe t...
77 流星雨成因探索 Date=8-2-01 Ttle=science report - the Perseid meteor shower Bline=Mario Ritter (Start at 59")his is the VOA special English science report. This month, you can see with your...