落後, 囚犯, 遲延, 桶板, 防護套1. the act of slowing down or falling behind
同義詞：slowdown, retardation
2. the time between one event, process, or period and another
同義詞：interim, meantime, meanwhile
3. one of several thin slats of wood forming the sides of a barrel or bucket
同義詞：stave
動詞lag:
1. hang (back) or fall (behind) in movement, progress, development, etc.
同義詞：dawdle, fall back, fall behind
2. lock up or confine, in or as in a jail
同義詞：imprison, incarcerate, immure, put behind bars, jail, jug, gaol, put away, remand
3. throw or pitch at a mark, as with coins
4. cover with lagging to prevent heat loss
