fall of的过去时态fall off跌落, 滚落下When you are learning to ride a bicycle, you often fall off.初学骑自行车时, 常会从车上掉下来。突然降低; 向下斜The land falls off here towards the river.这儿的地势朝河的方向低了下去。减少The number of passengers by this line fell off slightly in January.一月份这条航线的乘客数量略有减少。变坏; 恶化The cooking fell off remarkably.烹饪质量大
