自上而下选用框架具有质量高，框架完善容易，思考速度快等特点，它是先收敛再发散的过程。目的是找一个完整结构，然后围绕结构做“问题细化”。 It’s known for remaining one among her weaker novels, but it really stood in for the time when Christie was going through powerful personal struggles resulting from her mother’s Demise as well as breakdown of her to start with relationship. is among Chri... https://www.robot-forum.com/user/127573-godovietnam/