甘肃英文怎么写( 二 ) _甘肃

4. 兰州有趣的气候英文作文怎么写英文：Lanzhou is situated in the temperate zone and enjoys a semi-arid climate (K?ppen BSk) with hot summers and very cold and dry winters. Mean annual rainfall is 315 millimetres (12.4 in), almost all of which falls from May to October. The winters are so dry that snow is extremely rare.In regard to air pollution Lanzhou has some of the worst air quality of all cities in China. According to the Blacksmith Institute, Lanzhou is one of the 30 most polluted cities in the world, with its TSP (total suspended particle) rating 247% above that of the Gansu State recommendation. The air quality is so poor that at times one can not see Lanshan, the mountain rising straight up along the south side of the city. At one point, a controversial suggestion was put forward to bulldoze a mountain adjacent to the city, in order to let fresh air in to the bowl where Lanzhou is situated. It was suggested on the premise that the surrounding mountains block a free flow of air in the city. The city is located in a narrow river valley with an unfortunate curve causing it to be hemmed in with no free air flow. Lanzhou is also the home of many factories, including some involved in petroleum processing, and suffers from large dust storms kicked up from the Gobi Desert, especially in the winter and spring.The reach of the Yellow River at Lanzhou carries a high load of silt, giving the river its characteristic muddy appearance; however water quality in this reach is better than the "fetid outflow that barely passes for water two hours downstream. 翻译：兰州地处温带，并享有半干旱气候，夏季炎热，冬季非常寒冷和干燥（科彭BSK）。
平均年降雨量为315毫米（12.4），其中几乎所有的瀑布从五月到十月。冬天都是这么干的，雪是极为罕见的。
关于空气污染兰州有一些在中国所有城市的空气质量最差。根据铁匠研究所，兰州是30个污染最严重的城市在世界上与它的TSP（总悬浮颗粒）评级247%以上，甘肃国建议，之一。
空气质量这么差，有时无法看到岚山，山沿南侧的城市上升直线上升。在一个点上，提出了一个有争议的建议铲平一座山，毗邻城市，为了让新鲜空气，在位于兰州的碗。
有人建议的前提下，周围群山阻挡在城市的空气自由流通。该市位于一个狭窄的河谷与不幸造成它被包围在没有自由的空气流动的曲线。
兰州也是许多工厂，包括在石油加工中涉及的一些回家，并从大的灰尘，尤其是在冬季和春季，从戈壁沙漠踢风暴之害。进行在兰州黄河达到一个高负荷的淤泥，给河流，其特点泥泞的外观，但在这一河段的水质优于“恶臭流出，勉强通过对水的下游两个小时。

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