求达人分析下,track,trail,trace的区别,小弟跪谢~答:formulas for keeping the economy on track.保持经济正确发展的方案。the wrong side of the tracks (informal)a poor or less prestigious part of town (非正式)城镇贫民窟 trail n. 踪迹, 痕迹, 一串, 尾部, 小径, 持枪姿势 vt. 拖, 尾随, 追踪, 落后于, 开出路 vi. 拖曳, 垂下, 落后...