The heptane compound has a primary purpose as a plasticizer for doublebase propellant systems.化合物庚烷的主要用途是作为双基推进剂的增塑剂.However, it is difficult to produce multi branched i heptane and restrain its cracking.正庚烷异构化的难点在于高选择性地...
The plane spiraled the airport before.飞机降落前在机场上空盘旋.The bird slowly spiraled upward.鸟慢慢地盘旋上升.Vines spiraled upward toward the roof...藤蔓盘旋着朝屋顶方向生长。Vines spiraled upward toward the roof.藤蔓盘旋着朝屋顶方向生长。Genes are spiraled , thr...
在这种情形下他又冗长地说明这个问题.On this occasion he dilated at great length on the subject.缺少考虑地或冗长地说话.To chatter thoughtlessly or at length.反复地或冗长地讨论; 喋喋不休地讲.To discuss repeatedly or at length; harp on....