expound

"He is a student of life."

"The school's computer network is a complex of interconnected systems, linking classrooms, libraries, and administration offices. "

"My teacher explained the new math concept, and I understood it perfectly. "

"The students will discuss the history of the Roman Empire in their social studies class. "

"The meaning of the teacher's hand gesture was clear: "Pay attention." "

"My daughter's teacher is very kind and helpful. "

"My sister is very helpful, especially when it comes to organizing things. "

"To explain a chapter of the Bible."

"My uncle brought home a large imperial bottle of Bordeaux wine for the family celebration. "

"The teacher expounded on the causes of World War I for the entire class period. "

"My teacher made a statement about the importance of studying hard. "

"After many years as a party leader, she finally ascended to the presidency."