Through the comparison between at home and abroad, caving has developed on the stage of mature, organization and implementation of caving is perfect, the participants includes not only professional researchers but also a avocational lovers, the caving in our country is in its developing stage, and the caving technology and equipments are backward, caving security system is not complete, the participants are only the professional researchers and has not reach the stage which is popular.

通過對國內(nèi)外洞穴探險發(fā)展的對比研究99re在线观看视频这里只有精品，指出洞穴探險在國外已經(jīng)發(fā)展到了成熟階段插插国产视频，洞穴探險的組織實施以及洞穴探險保障體系也發(fā)展地較為完善黄色手机黄色网站在线播放，參與洞穴探險的不僅僅是洞穴研究人員4438ⅹ亚洲全国最大色丁香，更多的是業(yè)余的洞穴愛好者www.99riav4.com。

Not a nasty, dirty, wet hole, filled with the ends of worms and an oozy smell, nor yet a dry, bare, sandy hole with nothing in it to sit down on or to eat: it was a hobbit-hole, and that means comfort.

這可不是那種又臟又臭又濕国产91久久久久久，長滿了小蟲，滿是腐敗氣味的洞穴免费看九九爱爱视频；但是色色综合网址，它也并非是那種空曠多沙、了無生氣鲁847www、沒有家具的無聊洞穴A片一本污码。

Limestone and dolomite cover about 130 km2 which takes up about 1/7 areas of the national land in China. Besides, it is pluviose, muggy and damp in there areas, all of these accelerate the karst caves.

中國石灰?guī)r和白云巖的出露面積約為130km2，約占全國總面積的1／7欧美日韩A片ww免费，加之雨量充沛亚洲精品aaaa在线播放久，氣候溫熱潮濕，喀斯特較為發(fā)育97操碰免费视频t，地下洞穴孔道天天操天天日天天天舔，計有數(shù)十萬個之多，成為世界上的洞穴王國手机看片1024久久亚洲。

There are three genetic types of mineral deposits in the Beiya ore district:① Cu-Au polymetallic deposits related to alkaline porphyries, comprising porphyritic Cu-Au deposits and polymetallic skarn deposits related to quartz-albite porphyry and quartz-K-feldspar porphyry;② Fe-Au deposits related to gabbro or basalt magma, consisting of magmatic Fe-Au deposits and sedimentary polymetallic deposits formed in caves and lakes; and ③ palaeo-placers formed at the weathering surface, in lakes and in karsts.

北衙金礦有3種成因不同的礦床：①與堿性斑巖有關(guān)的銅金多金屬礦黄网站2020免费视频大全，包括與石英鈉長斑巖和石英正長斑巖有關(guān)的斑巖型銅金礦床和矽卡巖型多金屬礦床；②與輝長－玄武巖漿有關(guān)的鐵金礦床操乡村熟女A片网址，包括熔漿型鐵金礦床和噴流沉積型多金屬礦床色哟哟在线视频精品一区二区，后者又有洞穴和湖相沉積環(huán)境之分高清毛片在线看；及③古砂礦，有古風化殼型砂礦亚洲麻烦在线视频、河湖相古砂礦和洞穴沉積古砂礦一级美女少妇免费性爱视频。

At more than 50 stories deep, it's one of the largest caves in the world.

洞穴有50多樓層深，它是其中一個最大的洞穴在世界上欧美性爱视频看。

The hot lava and molten chunks of rock still bubbling away in some places have created at least 10,000 geothermal features in the park—from cobalt hot pools and mud pots that resemble boiling paint to steaming fumaroles and, most spectacular of all, 300 or so geysers, the most famous of which is Old Faithful.

在&老忠實泉&旁邊是呈洞穴狀的老忠實客棧羞羞视免费观看，這里是在雨天或寒冷時節(jié)觀賞老忠實間歇泉的好去處。這座建造于1903年的客棧是美國最大的原木建筑国产色无码免费无码视频软件，擁有幾百個房間伊人欧美在线视频免费版观看。夏日里，現(xiàn)場演奏的古典音樂在客棧巨大而多節(jié)的原木屋椽之間飄揚www.99reav6.com，游客們則可以在二層的露臺上觀賞&老忠實泉&沖破泉蓋国产在线观看精品入口，噴涌直上。

In Cappadocia, Turkey, the hotel called Anatolian Houses offers you suites built in five adjoining volcanic caves.

在土耳其星空卡巴多奇亞AV超碰A∨超碰AV超碰，叫做安納托利亞之家的旅館提供建在五個鄰近火山的洞穴的套間a毛片在线观看。

Containing some 600 paintings, Lascaux Cave in France's Dordogne River Valley is home to perhaps the world's most incredible array of Upper Paleolithic art.

包含大約600幅繪畫作品， Lascaux洞穴在法國多爾多涅河流域擁有也許是世界上最難以置信的陣列上部的舊石器時代藝術(shù)www.yazhouav。

Containing some 600 paintings, Lascaux Cave in France's Dordogne River Valley is home to perhaps the world's most incredible array of Upper Paleolithic art.

包含有大約600幅繪畫作品全免费a级毛片100部费观看，拉科斯洞穴在法國的多爾多涅河流域居住或許這個世界上最不可思議的大批上舊石器時代的藝術(shù)。

Photo Gallery: Cave Exploration Containing some 600 paintings, Lascaux Cave in France's Dordogne River Valley is home to perhaps the world's most incredible array of Upper Paleolithic art.

意譯：洞穴探險圖片畫廊人人操人人舔久久舔。包含大約600幅繪畫作品A片网站免费在线播放， Lascaux洞穴在法國多爾多涅河流域擁有也許是世界上最難以置信的陣列上部的舊石器時代藝術(shù)。