fēi​xíng​jiǎn​chá

drug testing

飞行检查 (飛行檢查) fēi​xíng​jiǎn​chá
drug testing
Unannounced out-of-competition or out-of-season drug testing for professional athletes to detect prohibited substances.
unannounced inspection
An unannounced or surprise inspection conducted by regulatory authorities, typically in industries like food, medicine, or environmental protection.

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Definitions
CC-CEDICT