backdate

v.回溯

back road, back room, back seat, back talk, back up, back-bench, back-bencher, back-breaking, back-formation, back-pedal, back-up, back-yard, backache, backbite, backbiter, backbiting, backbone, backchat, backcloth, backcomb (also tease), backdrop, backer, backfire, backgammon, background, backhand, backhanded, backhander, backing, backlash, backless, backlist, backlog, backpack, backpacker, backpacking, backrest, backscratcher, backset, backside,