Here is the English translation of the provided text, with the return characters kept as they are: "Two semen analyses were both azoospermic Semen volume is also low Testicular"

Patient's question:

Seven or eight years, low semen volume, like water, no sperm, testicular biopsy shows various stages of sperm-producing cells and a small amount of sperm

Doctor's answer:

Azoospermia can be divided into two major categories. The first category is testicular spermatogenic dysfunction, where sperm cannot be produced, also known as true azoospermia. The second category is normal testicular spermatogenic function, but with obstructed seminal ducts, where sperm cannot be expelled from the body, also known as obstructive azoospermia.