Cyclobutane exists predominantly in a " butterfly " conformation.环丁烷主要成 “ 蝶式 ” 构象存在.On the other hand , cyclobutane pyrimidine dimmer ( CPD ) just has an effect of cell cycle arrest.而CPD光 产物 ( cyclobutanepyrimidinedimmer...
如何成功的体外冲击波碎石术?How successful is extracorporeal shock wave lithotripsy?目的探讨输尿管镜气压弹道碎石术治疗尿路结石的临床疗效.Objective : To investigate the clinic effects of ureteroscopic lithotripsy in treatment of urethral calculi.目的探讨经皮肾镜碎石术肾盂冲洗...
邓恩先生贫穷的托词只是部分成立。Mr Dunn's pleas of poverty are only partly justified.采用传统的方法，贫穷的农民基本上能自给自足。Using traditional methods poor farmers can be virtually self-sufficient.减轻贫穷的行动action to mitigate poverty...