Congcheng Qu

icon company Changchun University of Science and Technology icon location ChangChun, JinLin, China

Results 1 issues of Congcheng Qu

文献公式解释

你好， ![6c7b94696e4ef5f7508b55d8b0f44a0](https://user-images.githubusercontent.com/72257490/158053761-4c9e9802-fb01-4f7f-bd91-a932a43da6de.png)请问这个公式的下标都代表什么含义？？