limiting speed短语¹⁸⁰⁰⁹⁸⁺¹ 基本例句 极限速度,限制速度 The focus of the project will be on reducing drink- driving, increasing the use of seatbelts, child restraints and motorcycle helmets, limiting speed, and strengthening trauma care. 项目的重点是：减少酒后驾车、提高安全带、儿童约束装置和摩托车头盔的使用、限速行驶和加强创伤治疗。 who