Withglobalwarmingand的精選

問題詳情：閲讀下面短文，根據其內容寫一篇60詞左右的內容概要。   Withglobalwarmingandmeltingice,itisn’teasybeingapolarbearanymore.Somestudieshavepredictedthatpolarbearscoulddieoutbytheendofthecentury.Th...