Determining the distribution model of hydrate and free gas occurrence in sediment with seismic attribute parameters
地震属性参数在识别天然气水合物和游离气分布模式中的应用
Objective To study the effect of oxygen free radical on the occurrence and development of cholangiocarcinoma .
目的探讨氧自由基在胆管癌发生与发展中的作用。
free occurrencefree occurrencefree occurrence