许多大城市汽车多，排放大量废气，污染问题日益严重。
Waste gases from automobiles account for the ever increasing problems of pollution in many big cities.
许多大公司和研究机构在基于SAN网络协议的.存储管理系统方面进行了大量的研究工作，并推出了一些商业化的系统。
Many foreign large corporations and research organizations have done a lot of research work in storage managing system based SAN.
美力行公司曾为许多大型建筑提供了大量的各种类型规格的点式幕墙配件。
Meilihang Company has ever provided large buildings with large amount of point-style curtain wall parts of various kinds and specifications.