Meaning of rèn zhēn:
认真
conscientious; earnest; serious
Tā duì gōngzuò fēicháng rènzhēn.
他对工作非常认真。
He is very conscientious about his work.
Tā zuò shì fēi cháng rèn zhēn, cóng bù fū yǎn.
他做事非常认真,从不敷衍。
He is very earnest in his work and never careless.
Tā zuò shì fēicháng rènzhēn.
他做事非常认真。
He is very serious about his work.
to take seriously; to take to heart
Tā duìdài gōngzuò zǒng shì fēicháng rènzhēn.
他对待工作总是非常认真。
He always takes his work very seriously.
Tā duì xuéxí fēicháng rènzhēn.
他对学习非常认真。
He takes studying very seriously.