a shoulder of lamb的用法和样例：
- A shoulder of lamb is half the price of a leg of lamb and is just as tasty.
- A major has a crown on the shoulder of his uniform.
- A shoulder of pork from which most of the butt has been removed.
- I bought a leg of lamb in the supermarket and it cost me a king's ransom.
- Do you also want a leg of lamb or lamb chops?
- The chef is preparing a roast of lamb.