地球外存在生命的理论是基于陨星上存在碳化合物质这一事实的.One theory about the existence of extraterrestrial life rests on the presence of carbon compounds in meteorites.据说这枚陨星是在热分解的化学过程中形成的。It is said that the magnetite was formed by a chemical pro...
She was tired of hearing the same dreary tale of drunkenness and violence.她听够了那些关于酗酒和暴力的乏味故事。They live such dreary lives.他们的生活如此乏味！a dreary winter's day阴沉的冬日His speech was dreary.他的讲演枯燥乏味.So a dreary Monday afternoo...
到目前为止，反叛分子面对威胁的反应非常谨慎。Rebel sources have so far reacted cautiously to the threat.书架上摆满了有关环境威胁的书，不堪重负。Bookshelves groan under the burden of books on threats to the environment.威胁的迫切性the immediacy of threat...
The normal mesangium contains about 2 to 4 mesangial cells, a macrophage - like function.正常系膜含2～4个具有巨噬细胞的功能的系膜细胞.stimulated macrophage受刺激的巨噬细胞The alveolar macrophage is particularly rich in the variety of proteolytic enz...