Testing VD pathogen through PCR may efficaciously prevent, cure and control VD.利用PCR技术检测性病病原体,可有效的预防, 治疗和控制性病.The results indicate that ozone can degrade AFB _ 1 in cereal efficaciously.结果显示:臭氧能够有效的降解谷物中的AFB_1.But we sho...
两个或两个以上的句子可以用连词连接.Two or more sentences may be joined together by a conjunction.and, but 和whereas是连词." And " , " but " and " whereas " are conjunctions.介词和连词是小品词.Prepositions and conjunctions are particles....