图片新闻【313】南极臭氧层空洞增大

A polar stratospheric cloud appears above Australia's Mawson Antarctic base in this undated handout picture. Australian scientists warn the ozone hole over the ice continent could grow to a record size in 2003 due to colder stratospheric temperatures, which result in the formation of clouds, that convert inert man-made gases into ozone destroying chemicals. (Reuters - Handout)

词汇：

stratospheric adj.[气]同温层的
Mawson 莫森(①姓氏 ②Sir Douglas, 1882-1958, 英国南极探险家, 地质学家及矿物学家)
Antarctic adj.南极的
undated adj.未标日期的, 无限期的
ozone n.新鲜的空气, [化]臭氧
convert vt.使转变
inert adj.无活动的, 惰性的, 迟钝的