hit a snag造句

1、A police clampdown on car thieves hit a snag when villains stole one of their cars.
匪徒偷走了警方一辆汽车后，警方打击盗车贼的行动遇到了一点儿小挫折。

2、We didn't expect to hit a snag before the machine was ready for production.
我们没有预料到机器投入生产前会遇到意外困难。

3、However, I hit a snag this time.
但这次，我碰了一个钉子。