所以你就需要构建一套自上而下框架，首先选择成型框架，譬如4P营销理论，（你也可以采用4C，4R营销理论）作为框架展开分析。 If you want these textbooks in checklist structure, I’ve established a printable Agatha Christie looking through checklist with all of her novels and limited story collections in publication purchase, marked with icons to denote which detectives seem by which titles. Te... https://forum.m5stack.com/user/godovietnam