It is time to bury our past misunderstandings.是我们捐弃前嫌的时候了。Clear up misunderstandings between the two nations.消除两国之间的误会.Tell your midwife what you want so she can make a note of it and avoid misunderstandings.把你的要求告诉助产士，这...
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...