a breed of sheep的用法和样例：
- Any of a breed of sheep, originally from Spain, having long, fine wool.
- Spaniel is a breed of dog with large ears.
- We have the finest breed of sheep.
- Any of a breed of sheep with long wool, developed in Lincolnshire, a county of eastern England.
- Any of a breed of domestic pigeons resembling owls.
- The Neijiang is also a breed of pig.