a virulent form of cancer的用法和样例：
- A virulent form of cancer.
- Then the doctor discovered that he was suffering from a virulent form of typhoid, the ravages of which took away his senses for a time and left him very weak.
- The diagnosis was a form of cancer called non Hodgkin's lymphoma.
- A new form of cancer is running rife throughout the world.
- a virulent form of flu