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- There is a natural cave in the side of the hill. 山坡上有一个天然的洞穴。
- There were a few natural caves on the reverse solpe. 背面坡上有几个天然的山洞。
- There were a few natural caves on the reverse slope. 背面坡上有几个天然的山洞。
- Rock, large and small, scattered in hundreds of natural caves. 岩壁上，散布着大大小小上百个天然洞穴。
- It formed with group spectacular underground caverns, kind of underground karst landforms.It also one of Asia's most spectacular natural caves. 阿庐古洞是一组奇特壮观的地下溶洞群，即地下喀斯特地貌，它是亚洲最壮观的天然溶洞穴之一。
- Mithraea were dark and windowless, even if they were not actually in a subterranean space or in a natural cave. 太阳洞穴是黑暗和无窗的，即使它们并不是在真正的地下空地或者自然洞穴里面。
- Children work at their desks at the Dongzhong primary school in Miao Village, China. The school is built inside a giant natural cave. 苗村洞中小学的孩子在上课,整个教室就是一个巨大的天然的石洞。
- The scenic spots, such as natural caves in Guilin, all sorts of pines on Mount Huangshan, the thousand-zhang waterfall of Mount Lushan, the West Lake in Hangzhou, constitute the wonderful scenery rarely to Be found in the world. 桂林天然岩洞，黄山各种松树，庐山千丈瀑布，杭州西湖等景致，构成了世上少有的完美风景胜览。
- Huanglong hole is actually a natural cave, which face storied plantation of Upper Permian requirement founded, but not dry air dry, rather than wet-Run, Four Seasons beautiful cool. 黄龙洞实际上是一个天然的岩洞，它面对层林叠嶂的千峰万壑，空气干而不燥，润而不湿，四季清幽凉爽。
- As the first successful introduction of natural caving method in domestic nonferrous metal mine,Tongkuangyu Mine increases production capacity and reduces production costs. 铜矿峪矿作为国内第一个成功引进自然崩落法技术的有色金属矿山,提高了矿山生产能力,降低了生产成本。
- According to the theory and method of particle flow code in two dimensions (PFC2D), the block caving law of natural caving mining method was investigated. 以自然崩落采矿法为研究对象,利用二维颗粒流数值模拟(PFC2D)的原理和方法,研究了自然崩落法矿体崩落规律。
- It is natural for a cat to catch mice. 猫捉老鼠是本能。
- It's natural to slack2 off towards the end of a hard day's work. 一天紧张工作快结束的时候有些放松是自然的。
- Many natural materials are becoming scarce. 许多天然原料越来越少。
- Natural limestone caves are very spectacular. 天然的石灰岩洞是非常壮观的。
- Our motherland flows with natural resources. 我们祖国蕴藏着丰富的天然资源。
- Events took their natural course. 事态依自然进程发展。
- She has a natural wave in her hair. 她的头发自然卷曲。
- Magnetism is a natural phenomenon. 磁力是一种自然现象。
- It is difficult to be natural when one is tense. 人在紧张的时候很难泰然自若。
