他穿著短褲，膝蓋的傷口已經(jīng)結(jié)痂。He had short trousers and scabby knees.你割破了, 血會(huì)凝固、結(jié)痂.When you cut yourself , blood clots and forms a scab.這個(gè)傷口會(huì)疼痛難忍，直到大約10天后結(jié)痂才會(huì)好些。The area can be very painful until scabs form after about ten days....