在这些化合物里, 环戊二烯环只有4个氢.In there compounds, the cyclopentadiene ring has only four hydrogens.聚二烯基本分子结构是一良好的燃烧剂.The polydiene basic molecular structure is an excellent fuel.所加的反应物可以是二烯烃 、 环二烯烃.The feed reactants can be alkadi...
Leadership is about the ability to implement change.领导才能就是要有实施变革的能力。The best implement for digging a garden is a spade.在花园里挖土的最好工具是铁锹.Quills were the chief writing implement from the 6 th century AD until the advent of s...
The actor in role of an old man wears false whiskers.扮演老头的演员戴着假胡子.He watched the cat cleaning the milk off her whiskers.他看着猫舔胡须上的牛奶.Winston could see the whiskers and the yellow teeth.温斯顿可以看到它的胡须和黄牙....