肺细胞约每周新老更替一次。Lung cells die and are replaced about once a week.昼夜更替.Day and night alternate.从事高等教育的人员新老更替极其缓慢。There has been very little renewal of personnel in higher education....
What separates terrorism from other acts of violence?恐怖主义和其他暴力行为的区别是什么?A chasm separates my generation from my parents '.分歧使我这一代人不同于我父母那一代.The Atlantic Ocean separates America from Europe.大西洋把美洲和欧洲分隔开来....
Purpose To observe the anti - glioma effects of lymphocyte activated by SEC.目的观察SEC活化的淋巴细胞对胶质瘤的杀伤作用.Objective To discuss the etiological relationship between brain trauma and glioma.目的探讨脑外伤与胶质瘤在病因学上有无关系.Objective To expl...