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敲钉钻脚
敲釘鑽腳
qiāodīngzuānjiǎo
1. to make doubly sure (idiom)

Character Breakdown

敲
qiāo
to hammer, to pound, to strike
HSK 4 14 丶
钉
dīng
nail, spike
HSK 6 7 丶
钻
zuān
diamond; to bore, to drill, to pierce
HSK 6 10 丶
脚
jiǎo
leg, foot; foundation, base
HSK 3 11 丶

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