Vacuum pump technology by using liquid-ring vacuum pump possesses the advantages of less energy consumption, compact structure and less land occupied.
机械抽真空技术具有能耗低、结构紧凑、占地少的特点。
I want to do after a house designer, because China is now a lot of people, the state house occupied many cultivated land, land, less and less people's quality of life in the fall.
我以后想做个房屋设计师，因为现在中国的人多，房子多，占用了国家许多耕地，土地越来越少，人们的生活质量在下降。
But, our country a lot of land is occupied, can continuously reduce the cultivated land area, arable land decrease, many kinds of food less, even some people starve to death.
可是，我国大量的土地都被占用，耕地面积就只能不断的减少，耕地减少，种的菜就少了许多，甚至有些人被饿死。
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