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。
She snagged a heel on a root and tumbled to the ground.
她的鞋后跟绊在树根上,跌倒在地。
The snag with all these ideas is that the data are not widely and quickly available.
所有这些想法的障碍是数据不是广泛和快速可得的。