it will travel hundreds of miles to the sea. 行程数百英里回到大海
Moisture rising as water vapour from the surface of the sea 水蒸发成水蒸气从海面升起
Mount Everest, five and a half miles above sea level and still rising - the roof of our world. 海拔5.5英里的世界屋脊 ——珠穆朗玛峰仍在不断升高
It's over a hundred metres below the level of the sea. 它的地势低于海平面100多米