a field of view的用法和样例：
- The peasants are reaping a field of barley.
- The telescope has a very narrow field of view.
- A field of study chosen as an academic specialty.
- Subjective assessment of the difference in appearance of two parts of a field of view seen simultaneously or successively.
- A dabbler in an art or a field of knowledge.
- A little dish offers a larger field of view but little sensitivity.