Books and articles on the subject have proliferated over the last year.过去一年以来，论及这一问题的书和文章大量涌现。Influenza proliferated throughout the country.流感在全国蔓延.When the cells were then shifted to an enriched medium, the mutant cells...
In recent years commercial, cultural, travel and other contacts have proliferated between Europe and China.近年来，欧洲和中国之间的商业、文化、旅游及其他交往发展迅猛。Influenza proliferated throughout the country.流感在全国蔓延.Proliferated, dense and gentl...