| Cave exploration often requires you to push yourself through narrow gaps in the rock. Cavers call such places squeezes. The tighter the squeeze, the greater the chance of damaging some vital life-support system. In these conditions a diver could easily become disorientated and that could be fatal. The flooded caverns can play tricks on you in other ways. What seems like air, isn't. It's just another kind of water. This is a halocline - a meeting of fresh and salt water. Fresh water from the jungle flows over the heavier salt water from the sea. The saltwater layer is extremely low in oxygen making it a particularly difficult place for animals to live. Yet some have managed it, like the remiped, one of the most ancient of all living crustaceans. | |
| 洞穴探险常常需要穿过狭窄的岩缝，探险者们把这些地方叫做“窄缝”。“岩缝”越窄，生命悠关的支援系统受损的可能性就越大。在这样的情况下，潜水员很容易迷失方向----而迷失方向就会有生命危险。水下洞穴还可能暗藏另外的危险。它看起来像空气，但它不是，而是另外一种水。这是盐度跃层，是淡水和海水相交之处。丛林中的淡水从更重的含盐海水上流过。盐水层中氧的含量极低，动物极难在其中生活，但还是有一些动物能做到，比如桡足动物，这是现存最古老的甲壳类动物之一。 |
| Cave exploration often requires you to push yourself through narrow gaps in the rock. Cavers call such places squeezes. The tighter the squeeze, the greater the chance of damaging some vital lifesupport system. In these conditions a diver could easily become disorientated and that could be fatal. The flooded caverns can play tricks on you in other ways. What seems like air, isn' t. It' s just another kind of water. This is a halocline a meeting of fresh and salt water. Fresh water from the jungle flows over the heavier salt water from the sea. The saltwater layer is extremely low in oxygen making it a particularly difficult place for animals to live. Yet some have managed it, like the remiped, one of the most ancient of all living crustaceans. | |
| dong xue tan xian chang chang xu yao chuan guo xia zhai de yan feng, tan xian zhe men ba zhei xie di fang jiao zuo" zhai feng"." yan feng" yue zhai, sheng ming you guan de zhi yuan xi tong shou sun de ke neng xing jiu yue da. zai zhe yang de qing kuang xia, qian shui yuan hen rong yi mi shi fang xiang er mi shi fang xiang jiu hui you sheng ming wei xian. shui xia dong xue hai ke neng an cang ling wai de wei xian. ta kan qi lai xiang kong qi, dan ta bu shi, er shi ling wai yi zhong shui. zhe shi yan du yue ceng, shi dan shui he hai shui xiang jiao zhi chu. cong lin zhong de dan shui cong geng zhong de han yan hai shui shang liu guo. yan shui ceng zhong yang de han liang ji di, dong wu ji nan zai qi zhong sheng huo, dan hai shi you yi xie dong wu neng zuo dao, bi ru rao zu dong wu, zhe shi xian cun zui gu lao de jia qiao lei dong wu zhi yi. |
| Cave exploration often requires you to push yourself through narrow gaps in the rock. Cavers call such places squeezes. The tighter the squeeze, the greater the chance of damaging some vital lifesupport system. In these conditions a diver could easily become disorientated and that could be fatal. The flooded caverns can play tricks on you in other ways. What seems like air, isn' t. It' s just another kind of water. This is a halocline a meeting of fresh and salt water. Fresh water from the jungle flows over the heavier salt water from the sea. The saltwater layer is extremely low in oxygen making it a particularly difficult place for animals to live. Yet some have managed it, like the remiped, one of the most ancient of all living crustaceans. | |
| dòng xué tàn xiǎn cháng cháng xū yào chuān guò xiá zhǎi de yán fèng, tàn xiǎn zhě men bǎ zhèi xiē dì fāng jiào zuò" zhǎi fèng"." yán fèng" yuè zhǎi, shēng mìng yōu guān de zhī yuán xì tǒng shòu sǔn de kě néng xìng jiù yuè dà. zài zhè yàng de qíng kuàng xià, qián shuǐ yuán hěn róng yì mí shī fāng xiàng ér mí shī fāng xiàng jiù huì yǒu shēng mìng wēi xiǎn. shuǐ xià dòng xué hái kě néng àn cáng lìng wài de wēi xiǎn. tā kàn qǐ lái xiàng kōng qì, dàn tā bú shì, ér shì lìng wài yī zhǒng shuǐ. zhè shì yán dù yuè céng, shì dàn shuǐ hé hǎi shuǐ xiàng jiāo zhī chù. cóng lín zhōng de dàn shuǐ cóng gèng zhòng de hán yán hǎi shuǐ shàng liú guò. yán shuǐ céng zhōng yǎng de hán liàng jí dī, dòng wù jí nán zài qí zhōng shēng huó, dàn hái shì yǒu yī xiē dòng wù néng zuò dào, bǐ rú ráo zú dòng wù, zhè shì xiàn cún zuì gǔ lǎo de jiǎ qiào lèi dòng wù zhī yī. |
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