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智课网 TOEFL备考资料 托福写作 The Salinity of Ocean Waters范文 摘要: 托福写作The Salinity of Ocean Waters范文 为了方便广大考生更好的复习,智课教育综合整理了关于托福写作The Salinity of Ocean Waters范文的相关内容,以供各位考生考试复习参考,希望对考生们的复习 为了方便广大考生更好的复习,智课教育综合整理了关于托福写作The Salinity of Ocean Waters范文的相关内容,以供各位考生考试复习参考,希望对考生们的复习能够有所帮助。 以下就是托福写作The Salinity of Ocean Waters范文的具体内容,愿大家都能够取得自己满意的成绩。 新托福考试写作考生想拿高分,“肚子里必须有点墨水”,背上一篇两篇优秀范文,以备不时 只需。以下这篇范文的题目是:The Salinity of Ocean Waters。 If the salinity of ocean waters is analyzed, it is found to vary only slightly from place to place. Nevertheless, some of these small changes are important. There are three basic processes that cause a change in oceanic salinity. One of these is the subtraction of water from the ocean by means of evaporation- conversion of liquid water to water vapor. In this manner the salinity is increased, since the salts stay behind. If this is carried to the extreme, of course, white crystals of salt would be left behind. The opposite of evaporation is precipitation, such as rain, by which water is added to the ocean. Here the ocean is being diluted so that the salinity is decreased. This may occur in areas of high rainfall or in coastal regions where rivers flow into the ocean. Thus salinity may be increased by the subtraction of water by evaporation, or decreased by the addition of fresh water by precipitation or runoff. Normally, in tropical regions where the sun is very strong, the ocean salinity is somewhat higher than it is in other parts of the world where there is not as much evaporation. Similarly, in coastal regions where rivers dilute the sea, salinity is somewhat lower than in other oceanic areas. A third process by which salinity may be altered is associated with the formation and melting of sea ice. When sea water is frozen, the dissolved materials are left behind. In this manner, sea water directly materials are left behind. In this manner, sea water directly beneath freshly formed sea ice has a higher salinity than it did before the ice appeared. Of course, when this ice melts, it will tend to decrease the salinity of the surrounding water. In the Weddell Sea Antarctica, the densest water in the oceans is formed as a result of this freezing process, which increases the salinity of cold water. This heavy water sinks and is found in the deeper portions of the oceans of the world. 我们并不主张考生死记范文,考试时如果遇到类似题目照搬上去,这并不能考察考生的写作
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