As to ways of explanation, "positive method" and "negativemethod" should be united.
就阐释方法而言，则应是“正的方法”与“负的方法”的统一。
2
There are two methods in studying metaphysics. One is the positive method, and the other is the negativemethod.
形而上学有两种方法，即正的方法和负的方法。
3
For NC machining of plane section method, the machining path of tool cutting plane and implicit surface can be found, and the curve of the tool path is drawn by the positive-negativemethod.