他在接受经验性的无环鸟苷治疗后, 多次血培养和脑脊液培养是阴性.He was treated empirically with acyclovir, and multiple blood and CSF cultures were negative.环二鸟苷酸系统是细菌纤维素生物合成中重要的调控体系.The Cyclic Diguanylic Acid Regulatory System is the important regulat...
滚滚浓烟盘旋翻腾，恶臭味呛得她喘不过气来。Dense smoke swirled and billowed, its rank fumes choking her.飞机在空中盘旋，令人不堪忍受。The aeroplane was gyrating about the sky in a most unpleasant fashion.一缕盘旋的轻烟从农舍唯一的烟囱里缭绕升起。A thin twist of smoke curled fro...