a tough policy的用法和样例：
- They are prepared to adopt a tougher policy.
- The change is from war and massacre to reform and deceit,from a tough policy to a soft one,from a military to a political policy.
- I am well aware that this is a tough job.
- Livingstone, who has adopted a tough policy towards road traffic, is neck-and-neck with Conservative rival Boris Johnson in polls in the runup to the May 1 mayoral election.
- He lives in a tough neighborhood.