新概念课文：冰山.docx

新概念课文：冰山★无忧考网新概念英语频道为大家整理的新概念课文：冰山，供大家参考更多阅读请查看本站（新概念英语）频道Icebergs冰山Icebergs are among nature’s most spectacular creations, and yet most people have never seen one. A vague air of mystery envelops them. They come into being -- somewhere -- in faraway, frigid waters, amid thunderous noise and splashing turbulence, which in most cases no one hears or sees. They exist only a short time and then slowly waste away just as unnoticed.Objects of sheerest beauty they have been called. Appearing in an endless variety of shapes, they may be dazzlingly white, or they may be glassy blue, green or purple, tinted faintly or in darker hues. They are graceful, stately, inspiring -- in calm, sunlight seas. But they are also called frightening and dangerous, and that they are -- in the night, in the fog, and in storms. Even in clear weather one is wise to stay a safe distance away from them. Most of their bulk is hidden below the water, so their underwater parts may extend out far beyond the visible top. Also, they may roll over unexpectedly, churning the waters around them.冰山是大自然最壮丽的制造之一，但大多数人却从未看到过冰山，一种模糊神奇的气氛覆盖着它们。

冰山形成于长远的、严寒的水体中，而且伴随着雷声轰鸣般的嘈杂和水花汹涌的风暴，但却无人耳闻目睹冰山仅存在短短的一段时间就渐渐地悄无声息地溶化掉冰山具有最纯粹的美，人们如是说冰山呈现出千姿百态，可能白得刺眼，或者是闪烁着蓝色、绿色或紫色的玻璃般的光线，或浓或淡它们在安静的阳光照射的海水中显得优雅堂皇，令人浮想联翩但是人们亦把冰山称为恐惧的和危急的它们确实如此--在夜间，雾天和风暴肆虐时即便是在晴朗的天气里，与它们保持一段安全距离也是明智的冰山的大局部体积稳藏于水下，因此其水下局部的伸展远远超过可见的顶部冰山也可能出人意料地翻滚，猛烈地搅动四周的水体Icebergs are parts of glaciers that break off, drift into the water, float about awhile, and finally melt. Icebergs afloat today are made of snowflakes that have fallen over long ages of time. They embody snows that drifted down hundreds, or maybe thousands, or in some cases maybe a million years ago. The snows fell in polar regions and on cold mountains, where they melted only a little or not at all, and so collected to great depths over the years and centuries.冰山是冰川的一局部，从冰川断裂漂流进水中，一段时间后溶化。

今日的冰山由多年前降落的雪花形成它们的体内是数百年，或数千年，有时甚至是数百万年前的降雪这些雪花落在极地或严寒的山上，仅有少量溶化或根本不溶化，这样经过很多年或很多世纪后积存了巨大的深度As each year’s snow accumulation lay on the surface, evaporation and melting caused the snowflakes slowly to lose their feathery points and become tiny grains of ice. When new snow fell on top of the old, it too turned to icy grains. So blankets of snow and ice grains mounted layer upon layer and were of such great thickness that the weight of the upper layers compressed the lower ones. With time and pressure from above, the many small ice grains joined and changed to larger crystals, and eventually the deeper crystals merged into a solid mass of ice.由于每年的雪花积存在外表之上，蒸发和溶化使得雪花渐渐失去其羽状尖端而变成微小的冰粒。

当新的雪花降落到旧的外表上，也变成了冰粒因而雪花掩盖层和冰粒层层积累起来直到如此之大的厚度以致较上层的重量压缩较下层在时间和压力的作用下，很多小冰粒结合到一起变成更大的晶体，最终较底层的晶体合并成浩大而结实的冰块。