spot checking
柯林斯詞典
1. N-COUNT If someone carries out a spot check, they examine one thing from a group in order to make sure that it is satisfactory. 抽樣調(diào)查; 抽查[oft N 'on' n]
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1. N-COUNT If someone carries out a spot check, they examine one thing from a group in order to make sure that it is satisfactory. 抽樣調(diào)查; 抽查[oft N 'on' n]