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英语美文--冰山

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冰山是大自然最壮观的创造之一,然而大多数人却从未见过冰山。一种朦胧神秘的气氛笼罩着他们。冰山形成于久远的、寒冷的水体中,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。它们只存在很短的一段时间,然后慢慢地在不知不觉中消失。它们被称为最纯粹的美之物。冰山呈现出千姿百态,可能白得耀眼,也可能是闪耀着蓝色、绿色或紫色玻璃般的光芒,或浓或淡。它们在平静、阳光普照的海面上显得优雅、庄严、令人振奋。但它们也被称为可怕和危险的,而且它们确实是——在夜间,在雾中,在风暴中。即使在晴朗的天气,明智的做法是与他们保持安全的距离。它们的大部分体积都隐藏在水下,所以它们的水下部分可能远远超出可见的顶部。此外,它们可能会意外翻身,搅动周围的海水。冰山是冰川的一部分,它会断裂,漂流到水中,漂浮一段时间,最后融化。今天漂浮的冰山是由经过很长时间的降雪形成的。它们代表着几百年,几千年,甚至是几百万年前的雪。这些雪落在极地和寒冷的山上,它们只融化了一点点,或者根本没有融化,所以经过多年甚至几个世纪的积累,雪积到了很深的地方。由于每年的雪积累在表面,蒸发和融化导致雪花慢慢失去羽毛状的尖端,变成微小的冰粒。当新的雪落在旧的上面时,它也变成了冰粒。因此,雪和冰粒层层堆积,厚度如此之大,以致上层的重量压缩了下层。在时间和压力的作用下,许多细小的冰粒结合在一起,变成更大的晶体,最后较深的晶体合并成固体的冰块。
Icebergs are among nature's most spectacular creations, yet most people have never seen one. A vague air of mystery enveloped 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 only exist for a short period of time, and then slowly and imperceptibly disappear. They are called the purest objects of beauty. 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, and exhilarating in a calm, sunny sea. But they're also called scary and dangerous, and they are - at night, in fog, in storms. Even on sunny days, it's wise to keep a safe distance from them. Most of their bulk is hidden underwater, so their underwater parts may be well above the visible top. In addition, they may accidentally turn over and stir the surrounding water. An iceberg is a part of a glacier that breaks off, drifts into the water, floats for a period of time, and finally melts. The icebergs that float today were formed after a long period of snow. They represent snow from hundreds, thousands, even millions of years ago. The snow fell in the polar regions and on the cold mountains. It only melted a little, or not at all, so over the years and even centuries it accumulated deep into the ground. As snow accumulates on the surface each year, evaporation and melting cause the snowflakes to slowly lose their feathery tips and become tiny grains of ice. When the new snow falls on the old one, it too becomes grains of ice. Thus the layers of snow and ice particles are so thick that the weight of the upper layer compresses the lower layer. Under the action of time and pressure, many tiny ice grains joined together and became larger crystals, and eventually the deeper crystals merged into solid ice.
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