1. They are taking steps to keep down the rabbit population.
2. I keep down my expenses this year.
3. High interest rates help to keep borrowing down.
4. They tried to keep down expenses.
5. I am trying to keep down expenses.
6. We must try to keep down expenses this year.
7. We hoe the garden to keep down the weeds.
8. The people have been kept down for years by a brutal regime.
9. Packs of ice were put on my forehead to keep down the fever.
10. They tried to keep down expenses.
11. If the enemy gets too close, we must keep down our voices.
12. The company wants to keep down labour costs.
希望这些例句对你有所帮助。