v.詳細說明；闡述；解釋

Laws are a dead letter without courts to expound and define their true meaning and operation. 法律如果沒有法院來詳細說明和解釋其真正意義和作用，就是一紙空文。

Secondly, I expound the trend and reason for the administration legislates. 其次，闡述了行政立法的發(fā)展趨勢及成因。

Laws are a dead letter without courts to expound and define their true meaning and operation. 法律如果沒有法院來詳細說明和解釋其真正意義和作用，就是一紙空文。

He even stops at one moment to expound on a business book that looks at the roles of Newtonian physics and chaos theory in corporations. 他有時候甚至會停下來，對一本探討牛頓物理學和混沌理論在企業(yè)中作用的商業(yè)書籍詳加解釋。