2019年雅思考试必看听力材料精编汇总4

许多考生觉得雅思听力难，无法理解，而且速度快。主要的问题是，他们通常会少听，漏听，在答题方面很受限制。所以在选择听力材料的时候要格外注意，今天小编就给大家带来坦途网雅思考试频道中的一篇听力材料，想要学习到更多内容的考生可以去网站里看看哦！现在我们就先看一下这篇文章吧！

Southern Ocean

The Southern Ocean (also known as the Great Southern Ocean, Antarctic Ocean, South Polar Ocean and Austral Ocean) comprises the southernmost waters of the World Ocean, generally taken to be south of 60°S latitude and encircling Antarctica. As such, it is regarded as the fourth-largest of the five principal oceanic divisions (after the Pacific, Atlantic, and Indian Oceans, but larger than the Arctic Ocean). This ocean zone is where cold, northward flowing waters from the Antarctic mix with warmer subantarctic waters.

Geographers disagree on the Southern Ocean's northern boundary or even its existence, with many considering the waters part of the Pacific, Atlantic, and Indian Oceans instead. Others regard the Antarctic Convergence, an ocean zone which fluctuates seasonally, as separating the Southern Ocean from other oceans, rather than the 60th parallel. Australian authorities regard the Southern Ocean as lying immediately south of Australia.

The International Hydrographic Organization (IHO) has not yet ratified its 2000 definition of the ocean as being south of 60°S. Its latest published definition of oceans dates from 1953; this does not include the Southern Ocean. However, the more recent definition is used by the IHO and others.

以上就是小编给大家整理的相关内容了，想要考好听力就要积累大量的词汇，然后还需要给自己营造一个良好的氛围和英文生活环境，在这样的环境下，小编相信大家的听力能力一定很快就会提升的，最后小编希望大家在雅思考试成绩查询结果出来时，看到的都是自己理想的成绩！