求翻译：科学家预测：如果地球表面温度的升高按现在的速度继续发展，到2050年全球温度将上升2－4摄氏度，南北极地冰山将大幅度融化，导致海平面大大上升，一些岛屿国家和沿海城市将淹于水中，其中包括几个著名的国际大城市：纽约，上海，东京和悉尼。是什么意思？

Scientists predict: If the Earth's surface temperature at the present rate continues to develop, by 2050 global temperatures will rise 2-4 degrees Celsius, north and south polar ice will melt significantly, leading to sea level rise greatly, some island nations and coastal cities submerged in water,

Scientists predict that if the temperature of the Earth's surface to continue to rise at the present pace of development, the 2050 global temperature will rise by up to 2 - 4 degrees Celsius, the polar regions to tip will be substantially melt, and sea-level rises considerably, leading to some of th

Scientist forecast: If the earth's surface temperature ascension continues according to the present speed to develop, the global temperature will rise to 2050 2-4 degree Celsius, the north and south polar region iceberg is large scale melts, causes the sea level big rise, some islands country and th

Scientists: If an increase in the temperature of the Earth according to current rates continue, by 2050 global temperature will rise by 2-4 degrees, North and south polar melting icebergs will greatly, cause a rise in sea level significantly, some of the island States and coastal cities will be subm

Scientists predict: If the Earth's surface temperature at the present rate continues to develop, by 2050 global temperatures will rise 2-4 degrees Celsius, north and south polar ice will melt significantly, leading to sea level rise greatly, some island nations and coastal cities submerged in water,