高中英语人教版高二下课文03

[08:00.73]但入海口受到保护使其免于受到波浪及岛屿、泥沙的袭击。
[08:04.60]Nutrients arrive in estuaries from both the land and the ocean.
[08:07.58]从陆地和海洋来的营养成分到达入海口。
[08:10.55]The density of living creatures is higher than in any other habitat on earth.
[08:13.83]生物的密度比地球上其他栖息地要高。
[08:17.11]The diversity of life in estuaries is incredible-birds,fish,marine mammals,
[08:21.04]入海口生物的多样性是惊人的-鸟、鱼、海洋哺乳动物、
[08:24.97]shellfish and other species all come here to live,feed and reproduce.
[08:28.85]贝类以及其它物种都来这和生活、捕食及繁殖。
[08:32.73]Estuaries are also important because they absorb nutrients
[08:35.60]入海口还非常重要是因为他们吸引从内陆来的水中的营养成分
[08:38.48]and pollutants from water coming from inland sources,
[08:41.14]与污染物，
[08:43.81]thus cleaning our water.Unfortunately,
[08:46.18]这样就净化了水，不幸的是，
[08:48.56]this function also makes estuaries very sensitive to environmental pollution.
[08:51.94]这种功能也使入海口对于环境污染特别敏感。
[08:55.33]Since estuaries protect animals and plants from storms and floods
[08:58.46]既然入海口保护动植物不受风暴及洪水侵袭，
[09:01.60]and prevent erosion,protecting estuaries is very important.
[09:04.57]防止侵蚀，对其保护就非常重要。
[09:07.55]Finally,estuaries provide both recreation and education for human beings.
[09:11.24]最后，入海口既为人类提供了娱乐活动又提供了救育资源。
[09:14.92]Most of us enjoy fishing,swimming and having fun on the beach,
[09:17.95]我们大都喜欢在海滨钓鱼、游泳和游玩。
[09:20.98]and scientists and students have endless opportunities
[09:23.55]科学家们和学生有无数的机会研究
[09:26.13]to study a variety of life in the habitat.
[09:28.61]在这个地方的多种生物。
[09:31.09]Estuaries also contribute to the economy through tourism and fishing.
[09:34.32]入海口可通过旅游业和渔业促过经济的发展。
[09:37.54]INTEGRATING SKILLS
[09:50.81]Reading   LIFE IN THE OCEAN
[09:55.28]The earth's oceans can reach depths of up to 11,000 metres.
[10:01.94]That is deep enough to cover Mt Qomolangma!
[10:06.67]The oceans are incredibly large and contain several different habitats.
[10:13.51]To make it easier to describe the various parts of the oceans,
[10:19.26]marine scientists usually divide the oceans into five zones.
[10:26.23]Each zone is different mainly as a result of how much sunlight reaches it.
[10:32.89]Most of the life in the ocean can be found in the first zone,
[10:38.96]which begins at the surface and goes down about 200 metres.
[10:45.51]Because there is sunlight at this level,plants are able to grow.
[10:51.57]Marine animals such as dolphins,sharks,sea turtles and sea lions,
[10:59.12]and of course a variety of fish,
[11:03.09]live in the sunlit part such as dolphins,
[11:07.45]It is difficult to hide from other animals in this area,
[11:12.73]but many species have adapted by becoming dark on the top
[11:18.58]and light on the bottom.
[11:21.95]This makes it diffucult to see them against the dark water below
[11:27.91]and the blue sky above.
[11:32.17]The second zone starts at 200 metres and goes down to about 1,000 metres.
[11:39.72]Some sunlight can reach this level,but it is not enough for plants to grow.
[11:47.08]Because this zone is relatively dark,
[11:51.73]may of the creatures that live here are able to make light with their body.
[11:59.10]The light from these animals makes the water look like a sky
[12:04.66]with moving stars in it.
[12:08.42]The third zone of the ocean is dark.
[12:12.87]This place,about 3,000 metres deep,may not seem a likely habitat,
[12:20.31]but there are more creatures here than one might think.
[12:25.67]Most of the animals that live here are black or red because of the lack of light.
[12:33.42]At this depth,a slow shower of what looks like snow is falling.
[12:40.40]This phenomenon,called"marine snow",
[12:45.65]is actually nutrients falling towards the bottom of the ocean.
[12:51.71]It is important source of food for the creatures that live in the deep.
[12:57.59]Below 4,000 metres,
[13:01.24]the temperature is near freezing and there is no light at all.