lump sum

one payment for a number of separate items; one sum paid all at once rather than in several smaller amounts 一次总付的钱.

lugubriousness, lugworm, lukewarm, lull, lullaby, lumbago, lumbar, lumbar puncture, lumber, lumber-jacket, lumber-room, lumberjack, lumen, luminary, luminosity, luminous, luminously, lumme (also lummy), lump, lump sugar, lumpish, lumpsum, lumpy, lunacy, lunar, lunar calendar, lunar month, lunatic, lunatic asylum, lunch, lunch-room, lunch-time, luncheon, luncheon meat, luncheon voucher, lung, lung-power, lunge, lupin (US lupine), lurch,