Menstruum crystal is widely used in cephalosporin production in view of its stability and high purity.溶媒结晶由于其稳定性和纯度高被广泛用于头孢菌素生产中....Hollywood funnyman Billy Crystal.好莱坞喜剧演员比利·克里斯托...crystal glasses.水晶玻璃杯Quartz crystal, c...
If you're a Billy Crystal fan, you'lllove this movie.如果你是比利·克里斯托的影迷，你会喜爱这部影片。Some of the finest drinking glasses are made from lead crystal.一些最高档的酒杯是用铅晶质玻璃制成的。The cliffs, lapped by a crystal-clear sea, remind h...
Do exercise every day and you'll be back in condition.每天锻炼锻炼,你很快会恢复健康的.You'd better get up early to do exercise.你最好早点起床锻炼身体.If he didn't do exercise every day, he wouldn't be so strong.如果他不每天锻炼, 他不会那样...