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WASHINGTON——The largest ozone(臭氧)hole ever observed hasopened up overt Antarctica,according to NASA scientists.They believe it isa sign that ozone—destroy
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WASHINGTON——The largest ozone(臭氧)hole ever observed hasopened up overt Antarctica,according to NASA scientists.They believe it isa sign that ozone—destroying gases produced years ago are just now causingthe largest quantities of ozone to disappear.
WASHINGTON——The largest ozone ( ozone) hole ever observed hasopened up overt Antarctica,according to NASA scientists.They believe it isa sign that ozone—destroying gases produced years ago are just now causing the largest quantities of ozone to disappear.
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