動詞 hold forth:

1. talk at length and formally about a topic
   同義詞：discourse, dissertate

1. A group of nuclear physicists holding forth at their annual convention.
   一群正在年會上進(jìn)行工作的核物理學(xué)家。
2. He loves holding forth on any subject once he has an audience.
   不管是什麼問題，只要有人聽，他就愛大發(fā)議論。