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本底调查
本底調查
běndǐdiàochá
1. background investigation

Character Breakdown

本
běn
root, origin, source; basis
HSK 1 5 丶
底
dǐ
bottom, underside; below, underneath
HSK 4 8 丶
调
diào
tune, melody, key; to transfer, to exchange
HSK 3 10 丶
查
chá
to investigate, to examine, to look into
HSK 3 9 丶

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