Thereisgoodandbadnew的精選

問題詳情：Thereisgoodandbadnewsaboutthenumberoftreesonourplanet.Thegoodnewsisthatthereareseventimesmoretreesthanwethought.Afewyearsago,scientistsbelievedthattheworldhad400billiontrees.However,anewstudyf...