straighten up 1. (使)挺直 As Jim straightened up, the ache in his back grew worse. 吉姆直起身子时背部的疼痛加剧了。 2. 整理，使整洁；澄清 straighten up the house 整理房屋 Straighten up your ideas! 把你的想法理理顺! 3. (使) 改正，(使)改过自新 It was Jim who did it! We all straightened up. 这事是吉姆干的! 我们都改邪归正了。 4. 付清欠账(或欠款)