A big rise in sea levels would be very costly, as it would swamp low-lying coastal regions and deltas and threaten small island states but is considered a low probability.是什么意思_A big rise in sea levels would be very costly, as it would swamp low-lying coastal regions and deltas and threaten small island states but is considered a low probability.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句