1) physical speleology
天然洞穴学
2) the natural cave
天然洞穴
1.
However,it is then more seldom seen in the earth sandstone that the natural cave is discovered;the natural cave that is discovered in the change flow stand of the Right bank of Yangtse gorges during the investigating and measuring results in many inconvenienceon to the Investigation and Construction.
但在泥质砂岩中发现天然洞穴则比较少见,在建设三峡右岸换流站时就发现了泥质砂岩中的天然洞穴,给勘探、施工造成了许多不便。
3) natural caves
自然洞穴
1.
On characteristics,development and utilization of Chongqing's natural caves
重庆自然洞穴的特色与开发利用
5) speleologist
[英][,spi:li'ɔlədʒɪst] [美]['spilɪ'ɑlədʒɪst]
洞穴学者
6) natural cave
天然洞体
1.
The Instability of natural cave is absolute and its stability is relative.
天然洞体不稳定是绝对的 ,稳定是相对的。
补充资料：石油天然气国际贸易(见石油市场与天然气市场)
石油天然气国际贸易(见石油市场与天然气市场)
石油天然气国际贸易(internotional tradeof011 and只as)见石油市场与天然气市场。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条