a curtain lecture的用法和样例：
- If you are late back from the club, my boy, you'll get a curtain lecture, mark my words.
- The castle was hidden behind a curtain of smoke.
- She bought some cloth to make a curtain.
- The conductor had the soloists take a curtain.
- The thief slid behind a curtain.
- Uncovered as by opening a curtain.