| One kind of rock makes this whole underground world possible - limestone. Most of the world's caves are found within it and it covers nearly 10% of the earth's surface. Limestone is composed of minerals derived from marine shells and corals, so although this rocky escarpment in the United States is now hundreds of metres above sea level it was actually formed under water. The limestone towers of Vietnam's Ha Long Bay are a reminder of this link with the sea. Originally, this whole area would have been one solid block of limestone, the base of a coral reef. In Borneo, rain has sculpted the limestone into extremely sharp-sided pinnacles. But the dissolving power of rainwater has other, much more dramatic effects underground. | |
| 有一种岩石使这种洞穴的形成成为可能，这就是石灰岩。世界上绝大多数岩洞都是由石灰岩形成的。地球表边近10%覆盖着石灰岩。石灰岩是由海洋贝壳类和珊瑚骨骼中的矿物质组成的，尽管位于美国的这座悬崖高出海平面数百米，但实际上它是在水下形成的。位于越南下龙湾的这些石灰岩山可以让我们看到它与海洋的联系。最初这一地区本是一个完整的石灰岩板块，一座珊瑚礁的礁底。在加里曼丹岛，雨水把石灰岩雕刻成了这种边缘异常尖利的石柱。但是，在地下雨水的冲蚀作用与此不同，并且更有戏剧性。 |
| One kind of rock makes this whole underground world possible limestone. Most of the world' s caves are found within it and it covers nearly 10 of the earth' s surface. Limestone is composed of minerals derived from marine shells and corals, so although this rocky escarpment in the United States is now hundreds of metres above sea level it was actually formed under water. The limestone towers of Vietnam' s Ha Long Bay are a reminder of this link with the sea. Originally, this whole area would have been one solid block of limestone, the base of a coral reef. In Borneo, rain has sculpted the limestone into extremely sharpsided pinnacles. But the dissolving power of rainwater has other, much more dramatic effects underground. | |
| you yi zhong yan shi shi zhe zhong dong xue de xing cheng cheng wei ke neng, zhe jiu shi shi hui yan. shi jie shang jue da duo shu yan dong dou shi you shi hui yan xing cheng de. di qiu biao bian jin 10 fu gai zhe shi hui yan. shi hui yan shi you hai yang bei ke lei he shan hu gu ge zhong de kuang wu zhi zu cheng de, jin guan wei yu mei guo de zhe zuo xuan ya gao chu hai ping mian shu bai mi, dan shi ji shang ta shi zai shui xia xing cheng de. wei yu yue nan xia long wan de zhei xie shi hui yan shan ke yi rang wo men kan dao ta yu hai yang de lian xi. zui chu zhe yi di qu ben shi yi ge wan zheng de shi hui yan ban kuai, yi zuo shan hu jiao de jiao di. zai jia li man dan dao, yu shui ba shi hui yan diao ke cheng le zhe zhong bian yuan yi chang jian li de shi zhu. dan shi, zai di xia yu shui de chong shi zuo yong yu ci bu tong, bing qie geng you xi ju xing. |
| One kind of rock makes this whole underground world possible limestone. Most of the world' s caves are found within it and it covers nearly 10 of the earth' s surface. Limestone is composed of minerals derived from marine shells and corals, so although this rocky escarpment in the United States is now hundreds of metres above sea level it was actually formed under water. The limestone towers of Vietnam' s Ha Long Bay are a reminder of this link with the sea. Originally, this whole area would have been one solid block of limestone, the base of a coral reef. In Borneo, rain has sculpted the limestone into extremely sharpsided pinnacles. But the dissolving power of rainwater has other, much more dramatic effects underground. | |
| yǒu yī zhǒng yán shí shǐ zhè zhǒng dòng xué de xíng chéng chéng wéi kě néng, zhè jiù shì shí huī yán. shì jiè shang jué dà duō shù yán dòng dōu shì yóu shí huī yán xíng chéng de. dì qiú biǎo biān jìn 10 fù gài zhe shí huī yán. shí huī yán shì yóu hǎi yáng bèi ké lèi hé shān hú gǔ gé zhōng de kuàng wù zhì zǔ chéng de, jǐn guǎn wèi yú měi guó de zhè zuò xuán yá gāo chū hǎi píng miàn shù bǎi mǐ, dàn shí jì shang tā shì zài shuǐ xià xíng chéng de. wèi yú yuè nán xià lóng wān de zhèi xiē shí huī yán shān kě yǐ ràng wǒ men kàn dào tā yǔ hǎi yáng de lián xì. zuì chū zhè yī dì qū běn shì yí gè wán zhěng de shí huī yán bǎn kuài, yī zuò shān hú jiāo de jiāo dǐ. zài jiā lǐ màn dān dǎo, yǔ shuǐ bǎ shí huī yán diāo kè chéng le zhè zhǒng biān yuán yì cháng jiān lì de shí zhù. dàn shì, zài dì xià yǔ shuǐ de chōng shí zuò yòng yǔ cǐ bù tóng, bìng qiě gèng yǒu xì jù xìng. |
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