尼罗河在此处变宽，从两块花岗岩巨石间穿过。Here the Nile broadens out between the huge granite boulders.“好吧，”我边说边紧张不安地把香烟在花岗岩台阶上捻灭。"Well," I said, grinding my cigarette nervously into the granite step.这些塔楼是钢结构，花岗岩贴面。The towers are made of ste...
现在必须研究在种群调节中内生性种群过程起重要作用的可能性.Now the possibility must be investigated that endogenous population processes are important in population regulation.首先, 本文回顾了国内外关于货币供给内生性理论的研究.First, this paper reviews the research on endog...