权威例句
Mutation near the polyoma DNA replication origin permits productive infection of F9 embryonal carcinoma cellsThe characterization of enzymatically amplified eukaryotic 16S-like rRNA-coding regions.Smallpox and its eradication.Smallpox and its eradication.Ribosomal RNA sequence shows Pneumocystis carinii to be a member of the FungiPhosphorus Spiralling in a Woodland Stream: Seasonal VariationsThe incidence and aetiology of stroke in the Caerphilly and Speedwell Collaborative Studies I: methods and incidence of eventsA randomised trial of low dose folic acid to prevent neural tube defects. The Irish Vitamin Study Group.Phylogenetic meaning of the kingdom concept: an unusual ribosomal RNA from Giardia lambliaThe Limiting Role of Phosphorus in a Woodland Stream Ecosystem: Effects of P Enrichment on Leaf Decomposition and Primary Producers