hold forth

动词 hold forth:

1. talk at length and formally about a topic
   同义词：discourse, dissertate

1. A group of nuclear physicists holding forth at their annual convention.
   一群正在年会上进行工作的核物理学家。
2. He loves holding forth on any subject once he has an audience.
   不管是什麽问题，只要有人听，他就爱大发议论。