spot check

名词 spot check:

1. a check on work performance or product quality made at random times without warning

动词 spot check:

1. pick out random samples for examination in order to ensure high quality
   同义词：spot-check

1. The campaign against drinking and driving will include spot checks on motorists.
   在禁止酒後开车这一行动中要对司机突击检查。
2. The campaign against drinking and driving will include spot check on motorist.
   在禁止酒後开车这一行动中要对司机突击检查。