Tā liǎnshàng hái zhìqì-wèituō, yǐjīng tàshàng le zhànchǎng.
His face still bore traces of childhood, yet he had already stepped onto the battlefield.
Tips
usage
Stock journalism phrase for young athletes, soldiers, or prodigies - usually appreciative, sometimes affectionate. Literally 'childish air not yet shed'. Often paired with 脸上 or used attributively before nouns describing the person.