The advantage of the mound fire is that it can be built on flat exposed rock or on an organic surface such as litter, duff or grass.
堆火的好处在于它既够在平整暴露的岩石地面进行，又可以在象干草落叶一样的有机物轮廓进行。
The Shuibuya hydroelectric project will be built in gorge morphology on Qingjang River, the gravitation is key factor which decides whether the rock in dam site is stable or not.
水布垭水电枢纽拟建于清江干流深切峡谷地段，重力是决定坝址区岩体稳定与否的关键因素。
But a city which is built foursquare, enclosed in a circle or on the top of a hill, and established on a rock, can neither fall nor be hidden.
但是方形的城市，围成圆形的，或是建在山顶上的用石头建造的，既不会倒塌也不会隐藏。
But a city which is built foursquare, enclosed in a circle or on the top of a hill, and established on a rock, can neither fall nor be hidden.
但是方形的城市，围成圆形的，或是建在山顶上的用石头建造的，既不会倒塌也不会隐藏。
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