spot check
noun [ C ] uk/ˌspɒt ˈtʃek/ us/ˌspɑːt ˈtʃek/
抽查
a quick examination of a few members of a group instead of the whole group
The police are doing spot checks on motorists to test alcohol levels. 警方正在对司机进行现场抽查,检测是否有人酒后开车。
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