投入 (tóu rù) means “to throw into; to put into; to throw oneself into; to participate in; to invest in; absorbed; engrossed”. It is an HSK 5 Chinese word in the HSK 3.0 vocabulary.
他全身心投入到工作中。
Tā quán shēnxīn tóurù dào gōngzuò zhōng.
He throws himself wholeheartedly into work.
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