手术使我重获新生。The operation has given me a new lease of life.所有入学新生中约有40%在4年内毕业。About 40% of all students entering as freshmen graduate within 4 years.新生身上有一种朝气和热情。There was a freshness and enthusiasm about the new students....
用原子荧光仪分析污酸中的砷.Arsenic in waste acid was determined successfully by atomic fluorescence.研究人员特意用新的袖珍荧光仪检测了天然彩色钻石的荧光特征.Specifically , these researchers examined fluorescence trends of natural fancy - colored diamonds using ...