a quartz watch的用法和样例：
- I'll take a quartz watch to replace my old mechanical one.
- Where the source of energy in a mechanical watch is the spring, in a quartz watch it is a miniature battery which lasts for several years.
- In a quartz watch the oscillator is a quartz crystal, which has the property that it vibrates in the presence of an electric field.
- He bought a quartz watch.
- The quartz watch keeps good time.