经过3个周末的追求之后，帕梅拉接受了伦道夫的求婚。After a three-weekend courtship, Pamela accepted Randolph's proposal of marriage.不如咱俩这个周末出去度假吧？Why don't you and I go away this weekend?该农场仅在两个周末接待日才对公众开放。The farm is open to the public...
The army had perfected the use of terror as a means of controlling the population.军队已经深谙利用恐怖手段控制民众之道。-- Measures for preventing and controlling industrial pollution have gradually been perfected.-- 工业污染防治措施逐步完善.The main ...
使平面向右旋转的对映体,称为右旋对映体.The enantiomer that rotates the plane to the right is referred to as the dextrorotatory.诀曰: 左旋 右旋天地旋, 左踏右空平地旋.Tactics Ld : L - d - world spin, left the ground empty spin right step.像其他许多分子一样, 氟比洛芬酯具有左...
不完全的燃烧和不适当的通风条件能导致乙炔的产生.Incomplete combustion and improper draft conditions can cause ethylene formation.已多次证实火焰中存在聚乙炔.That polyacetylenes are present in flames has been demonstrated many times.这种反应构成了制备芳基环丙基乙炔的有效方法.This...