a model of an airplane的用法和样例：
- According to an undercarriage loading system of an airplane, a linear model of an electrohydralic servo system was established and simulated.
- 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.
- He resolved that his conduct should be worthy of an aspirant who was already a model of discretion.