Especially China's cities, because of the finiteness and tension of the land resources and the growing urban population, we must take the high-rise building as the main body of urban construction.

尤其在我国的城市，由于土地资源的有限性、紧张性，以及城市人口的日益增加，必须将高层建筑作为城市建设的主体。

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The high tension electroceramics using Long Jiang county wollastonite as a main material were successfully developed first.

首次利用龙江县硅灰石研制出了高压电瓷，并测试了其晶相组成和性能。

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