安娜与几个建筑商有过接洽，并且很幸运地碰到了埃迪。Anna approached several builders and was fortunate to come across Eddie.赫伯特一定会就如何与银行接洽向她提供意见。Herbert would surely advise her how to approach the bank.我按照指示接洽了一位苏联国际旅行社官员。I approached an Intourist...
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...