but with this platform now gone, they need a new place to haul out and nurse their young. 但这块平台已经消失,它们需要新的地方哺育幼仔
Without its solid platform, they can't hunt the seals they need in order to survive. 没有坚实的冰作为平台, 北极熊就不能猎捕它们赖以生存的海豹