a model of perfection的用法和样例：
- He showed us a model of the new office building.
- His mother is a model of industry.
- In the presence of elderly visitors our son was a model of decorum.
- The plan composed by Weierother at Austerlitz was a model of perfection in its own line, but it has yet been condemned, and condemned for its very perfection, for its over-minuteness in detail.
- I've seen a model of one in a museum.
- This student is a model of diligence.