keep pace of =keep trace of

keep pace of =keep trace of keep pace with keep pace with the keep pace with the mean of transport是什麽意思 keep pace with / catch up with/ keep abreast with the latest development of … keep pace with & keep step with怎么区别～～ 请问：keep step with和keep pace with的区别? Keep up with the high pace of modern life 求翻译如题. we must keep on learning if we want to keep up with the ( ) of the changing times.A.schedule B.journey C.pace D.transport keep keep keep keep keep keep keep Keep keep