Tā dānqiāngpǐmǎ wánchéng rènwù, jiǎnzhí jiùshì gūdǎn yīngxióng.
He completed the mission single-handedly - a real lone hero.
Tips
memory
Parse it as 孤+胆 + 英雄: 'solitary-gall hero'. 胆 (gall bladder) is the seat of courage in Chinese - a 孤胆 person has courage that needs no companions to back it up.
