年代较近的针叶树林场还比不上年代久远的林场。The more recent conifer plantations cannot yet compare with the old woodlands.冷杉 、 云杉和松树都是针叶树.Firs, spruces and pines are conifers.萨维斯 讨论了针叶树的致死的基因性质.Sarvas discusses the nature of the " lethal load...
很多环戊烷的衍生物在这个范围也出现吸收.Many cyclopentane derivatives also absorb in this region.后者是由二氧杂环戊烷中活化较弱的C -H 键离解而产生的.The latter arises from abstraction of the somewhat lesser activated C - H bond in the dioxolane.控制缩合反应的温度,还得到一种苯并环...