time-saving

a.省时的

tiller, tilt, tilted, tilth, timber, timber-line, timber-wolf, timbered, timbre, time, time bomb, time exposure, time warp, time zone, time-card (also `time-sheet), time-consuming, time-fuse, time-honoured (US time-honored), time-lag, time-limit, time-scale, time-server, time-serving, time-sharing, time-sheet, time-signal, time-switch, time-table, time-worn, timekeeper, timeless, timelessly, timelessness, timeliness, timely, timepiece, timer, times, timetable, timetable (also esp US schedule),