The production techniques, characteristics, applications of metallocene polyethylene, and its new development in industrialization are introduced.介绍了茂金属聚乙烯的制造技术 、 特点 、 产品特性和用途, 以及它的开发和工业化的最新进展.The progresses in five - me...
It is a part of Britain as yet largely unaccustomed to tourists.英国的这一块地方还很不为游客所熟悉。He began to comfort me with such unaccustomed gentleness.他开始以那种少有的温柔安慰我。His nose had been reddened by unaccustomed exposure to the Califor...