他混迹于有魅力、有学问或有名气的人当中。He surrounds himself with attractive, intelligent, or well-known people.他的学问显然博大精深。His erudition was apparently endless.把物理学界定为一门探求简单规律的学问the characterization of physics as the study of simplicity...
冻土带的生命循环将受到怎样的影响 呢 ?How will the lifecydes of the tundra be affected?一项关于永冻土带融化的新的发现可能不久以后会改变全球的气候.New understanding of permafrost melt could soon alter global - climate models.这是出现在亚北极区冻土带夜幕中的北极光.The Aurora Borealis as ...