Thereisgoodandbadnew的精选

问题详情：Thereisgoodandbadnewsaboutthenumberoftreesonourplanet.Thegoodnewsisthatthereareseventimesmoretreesthanwethought.Afewyearsago,scientistsbelievedthattheworldhad400billiontrees.However,anewstudyf...