The Beatles— I never get tired of listening to them.甲壳虫乐队——我是百听不厌.The Beatles were discovered in the early 1960's.甲壳虫乐队于20世纪60年代初为世人所知。The Beatles enjoyed only middling success until 1963.直到1963年，甲壳虫乐队还只是半红不紫。...
在工业过程中, 常用精馏作用把液体混合物分离为纯组分.In industrial processes, liquid mixtures are often separated into their pure components by distillation.讨论用于甲醇生产主精馏塔改进工艺条件下的智能控制方法.An intelligent control method for operation of methanol refini...