a medical dictionary的用法和样例：
- I bought a medical dictionary one week ago.
- Owen's maladies read like a medical dictionary: mumps, a double hernia, thigh strains, calf strains, concussion, pulled hamstrings, a cracked ankle, not to mention the two more serious injuries.
- The stethoscope is a medical instrument.
- I had a medical checkup before going abroad.
- I have to have a medical before going abroad.
- The hospital have a medical ward and a surgical ward.