在珠穆朗玛峰的山顶，海拔在8848米的地方，那里的空气中所包含的氧分子比它在海平面的三分之一还要少。
At the top of Mt Qomolangma, at 8848 metres above sea level, a lungful of air contains less than a third as many oxygen molecules as it does at sea level.
桂西北典型峰丛洼地是一个缺水少土、汗涝灾害严重、农业生态环境十分严酷的区域。
The Typical Karst Peak-cluster Depression Area of Northwest Guangxi Autonomous Region is an Area that is droughty, absent soil and agricultural Eco-environment deterioration.
根据液相色谱图可知，乙酸乙酯萃取所得产品杂峰少，产品纯。
It can be included that the product has less impure peaks and was pure by the ethyl acetate extraction.
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