HSK 7-9
全身心
quánshēnxīn副
wholeheartedly; (to devote oneself) heart and soul
他全身心投入科研工作。
Tā quánshēnxīn tóurù kēyán gōngzuò.
He devoted himself wholeheartedly to scientific research.
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Appears across levels (7-9) in the HSK 3.0 word list.