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ngoˍ₆臥daiˊ²底
(卧底)
Pinyin
wo4 di3
Translations
noun
do undercover work
ngoˍ₆臥daiˊ²底hangˎ₄行dungˍ₆動
(卧底行动)
Pinyin
wo4di3 xing2dong4
Translations
noun
an undercover operation; a sting operation [written and colloquial]