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02:54 Oct 11, 2008 |
English to Chinese translations [PRO] Science - Geology Additional field(s): Geography | |||||||||||
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Selected response from: Li Cao United States Grading comment
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Summary of translations provided | ||||
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5 +2 | 破火山口 |
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破火山口 Definition from 百度知道: 火山口是大自然建造火山的产物,破火山口则是火山受到破坏的结果。 在大自然建造火山的过程中,各种自然力对火山的破坏作用已在发生,只是由于得到不断喷出的物质补充,所以能保持或增加它的高度,形成火山特有的形态,圆锥形是最典型的。 不过仅仅是风雨等外部力量的侵蚀,一座火山要破坏到在地面上消失的程度,需要很长的时间,但如火山爆发猛烈,可以在短暂的时间内,将原有火山锥部分甚至整个炸成齑粉,抛上天空;火山的高度因而被削减,乃至成为凹进地面下的大坑。如果喷出的结果使地下原来储存岩浆的场所被掏空,顶壁的岩层支撑不住因而塌落,凹陷的范围更为巨大,直径常有几千米,直至几十千米,上下宽窄相差没有火山口那么显著,底部也比火山口的底部宽大平缓,在西方语言中称它为 “caldera”,源出于西班牙语“caldron”,本意是锅,西方人用的平底锅,其形相似,中文译作“破火山口”,用为地质学的专用名词。 Example sentence(s): |
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