Cambridge scientist Peter Wadhams, who's been measuring and monitoring the Arctic since 1971, says the decline is irreversible.
剑桥科学家彼得·沃德姆斯自1971年以来一直在测量和监测北极，他说这种减少是不可逆转的。
Cambridge scientist Peter Wadhams, who's been measuring and monitoring the Arctic since 1971, says the decline is irreversible.
剑桥科学家彼得·沃德姆斯自1971年以来一直在测量和监测北极，他说这种减少是不可逆转的。
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