- 問題詳情:Birdsenjoyarelativelyslowrateofextinctionbutanewstudysuggeststhatratemightbeseverelyunderestimated(低估).Evenworse,ifhumanactionscontinue,birdextinctionratescouldskyrocketand12percentoftheknownbirdspecies(物種)couldbedyingoutbytheendofthecent...
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