Ocean water plays an indispensable

Ocean water plays an indispensable role in supporting life. The great ocean basins hold about300 million cubic miles of water. From this vast amount, about 80,000 cubic miles of water are sucked into the atmosphere each year by evaporation and returned by precipitation and drainage to the ocean. More than 24,000 cubic miles of rain descend annually upon the continents. This vast amount is required to replenish the lakes and streams, springs and water tables on which all flora and fauna are dependent. Thus, the hydrosphere permits organic existence.
The hydrosphere has strange characteristics because water has properties unlike those of any other liquid. One anomaly is that water upon freezing expands by about 9 percent, whereas most liquids contract on cooling. For this reason, ice floats on water bodies instead of sinking to the bottom. If the ice sank, the hydrosphere would soon be frozen solidly, except for a thin layer of surface melt water during the summer season. Thus, all aquatic life would be destroyed and the interchange of warm and cold currents, which moderates climate, would be notably absent.
Another outstanding characteristic of water is that water has a heat capacity which is thehighest of all liquids and solids except ammonia. This characteristic enables the oceans to absorb and store vast quantities of heat, thereby often preventing climatic extremes. In addition, water dissolves more substances than any other liquid. It is this characteristic which helps make oceans a great storehouse for minerals which have been washed down from the continents. In several areas of the world these minerals are being commercially exploited. Solar evaporation of salt is widely practiced, potash is extracted from the Dead Sea, and magnesium is produced from sea water along the American Gulf Coast.

Kết quả (Việt) 1:

Ocean water plays an indispensable role in supporting life. The great ocean basins hold about300 million cubic miles of water. From this vast amount, about 80,000 cubic miles of water are sucked into the atmosphere each year by evaporation and returned by precipitation and drainage to the ocean. More than 24,000 cubic miles of rain descend annually upon the continents. This vast amount is required to replenish the lakes and streams, springs and water tables on which all flora and fauna are dependent. Thus, the hydrosphere permits organic existence.The hydrosphere has strange characteristics because water has properties unlike those of any other liquid. One anomaly is that water upon freezing expands by about 9 percent, whereas most liquids contract on cooling. For this reason, ice floats on water bodies instead of sinking to the bottom. If the ice sank, the hydrosphere would soon be frozen solidly, except for a thin layer of surface melt water during the summer season. Thus, all aquatic life would be destroyed and the interchange of warm and cold currents, which moderates climate, would be notably absent.Một đặc điểm nổi bật của nước là nước có công suất nhiệt mà là thehighest của tất cả các chất lỏng và chất rắn ngoại trừ amoniac. Đặc tính này cho phép các đại dương để hấp thụ và lưu trữ với số lượng lớn của nhiệt, do đó thường ngăn chặn khí hậu Thái cực. Ngoài ra, nước hòa tan chất nhiều hơn bất kỳ chất lỏng khác. Nó là đặc tính này giúp làm cho đại dương một kho lớn khoáng sản mà đã được rửa sạch từ các lục địa. Trong một số khu vực của thế giới các khoáng chất đang được thương mại khai thác. Năng lượng mặt trời bốc hơi muối thực hành rộng rãi, kali được chiết xuất từ biển chết, và magiê được sản xuất từ nước biển dọc theo bờ biển vùng Vịnh Mỹ.