他说今年的覆盖量是有史以来的第五个最低记录。
He says this year's cover is shaping up to be the fifth lowest ever.
可以说这两大产地占据了全国80%以上的覆盖量。
It can be said that these two regions accounted for more than 80% of the country's coverage.
由于气候变化，北冰洋夏季的冰覆盖量现在仅是50年前的一半。
Because of climate change, the Arctic Ocean's summer ice cover is now half of what it was 50 years ago.
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