1. He expounded his views to his colleagues. 他向他的同事们陈述自己的见解。
2. You can expound on the virtues of eating salt. 您能长篇大论地说明有关吃盐的好处。
3. Expound the concept of direct stray current of underground coal mine, analyze its harm, and proride some preventive measures. 阐述了煤矿井下直流杂散电流的概念，分析了其产生的危害，提出了防治措施。
英英解释
v.
1. add details, as to an account or idea; clarify the meaning of and discourse in a learned way, usuall
2. state
