1.放心吧!我不会让你失望的(let down) don't worry! i will not let you down 2.那些不遵守纪律的人迟早要付出代价的(price) those people who don't abide by discipline will sooner or later pay the price 我改---> those people who have a lack of discipline will pay the price sooner or later 满意请采纳,谢谢