perform preliminary marketing and sales steps这句话是什么意思

perform preliminary marketing and sales steps这句话是什么意思 perform Preliminary English preliminary diagnostic preliminary calculation;preliminary computation是什么意思 preliminary-findings是什么意思 preliminary layout是什么意思 preliminary injunction是什么意思 Preliminary的意思是什么? preliminary reading是什么意思 preliminary hearing是什么意思 preliminary是什么意思啊?如何背? The ____(perform) always ____ (perform) well 1.Preliminary Work Is a Must preliminary和original的区别是什么 behave和perform区别 perform at the piano perform a play for