fellvt.砍伐；击倒n.丘原；沼泽地adj.凶残的；毁灭性的动词fall的过去式.fell asleepvi.入睡；长眠；懈怠fell acrossv.碰到(遇到)felling ban禁伐felled tree采伐木,伐倒木fell out ofv.停止(不再)fellifluous胆汁溢流的fell behindv.落后；拖欠Fell system菲尔系统fell asternv.落在后面fell in forv.得到(受到)