The paper introduces the structure, the every hydrological elements and the calculation method of four waters transformation model for Second songhuajiang river mainstream.

文中叙述了四水转化模型的结构及制作，并详细介绍了模型中各项水文要素及计算方法。

youdao

Russia’s Gazprom bought a stake in four oil-exploration blocks in Cuban waters in the Gulf of Mexico. Several companies plan to begin drilling off Cuba next year.

俄罗斯天然气工业公司投下赌注，它买下位于墨西哥湾古巴水域的四个石油开发区块，数家公司计划明年在古巴沿海地区开始钻井施工。

youdao

Many primitive lineages went extinct as sharks and bony fish became masters of the waters and tetrapods, the four-legged animals that eventually evolved into dinosaurs and mammals, conquered the land.

许多原始生物灭绝，鲨鱼和硬骨鱼成为水域的主人，四足动物最终进化成了恐龙和哺乳动物，征服了陆地。

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But already this year, pirates have carried out more than eighty-four attacks in the waters of the Gulf of Aden and off the Somali coast.

VOA: special.2009.05.27

Entrants representing countries from Bosnia to South Korea submit a total of more than 100 waters among four categories, including best municipal (tap) water, best bottled non-carbonated water, best bottled carbonated water and best purified (distilled or mechanically filtered) water.

BBC: Testing the waters in West Virginia

Elsewhere, waters rushed into two of the four tunnels used by the Long Island Rail Road, Amtrak and NJ Transit under the East River between Manhattan and Queens.

WSJ: Buses Back, But Subways Could Take Days Longer

Living near arctic waters, its bivalves clam up for four-to-six months each year, making the oyster's muscles bigger and meat sweeter.

WSJ: New Dishes Make Waves at Belgium's Seafood Showdown