您所在的位置:QQ首页 > 教育频道 > 点滴精华 > 正文

如何在流沙中“游泳” 不至遭遇“灭顶之灾”
http://edu.QQ.com   2006年09月21日 10:17   英语点津  

在很多电影和传说中都有流沙的影子,它在人们的印象中是沙漠里极其危险的东西。不过,根据科学家最近的研究,流沙并没有想象中那么危险,人们完全可以借助浮力在流沙中“游泳”,而不至遭遇“灭顶之灾”。

Quicksand consists of a buoyant blend of round granules of light sand, blended with water, or of light soil and gritty mud, or of mud peppered with pebbles. Water injects itself into the grains of any one of these mixtures, which separates and lifts them, causing them to tumble over one another, and rendering them helpless to support weighty objects.

·
·
·
·
·
·

Quicksand typically surfaces near the deltas of mighty rivers, or near shores, where a layer of stiff clay below collects and retains the water. Quicksand does not suck unsuspecting victims to their untimely deaths; a theory espoused me most until recently. This nightmarish theory did, however, provide good fodder for a host of low-budget horror films!

The discovery of quicksand's buoyant properties, akin to those of the salty Dead Sea, quashed this prevalent theory. Since quicksand is saturated with liquid, and far outweighs water, it allows anything or anyone who steps into it, to float higher than possible in water alone. The key to swimming in this non-chlorinated swimming hole is slow motion. By moving slowly, when initially landing in quicksand, one provides the quicksand with the lead-time necessary to flow around one's body, thereby making swimming or floating possible.

quicksand: 流沙

buoyant: 有浮力的

granules: 颗粒

gritty: 含沙的

tumble: 翻动

nightmarish: 噩梦似的、不愉快的

akin: 类似的

non-chlorinated: 非绿色的

[责任编辑:judycai]

教育论坛】【  】【关闭
发表评论
  查看评论
* 请各位网友遵纪守法并注意语言文明。
*《互联网电子公告服务管理规定》
*《全国人大常委会关于维护互联网安全的规定》




校 园 周 刊
2009中国教育之问

美女北京街头向人索舞
网友意见留言板
关于腾讯 | About Tencent | 服务条款 | 广告服务 | 腾讯招聘 | 腾讯公益 | 客服中心 | 网站导航
Copyright © 1998 - 2010 Tencent. All Rights Reserved
腾讯公司 版权所有