lukewarm

adj. 微温的，不热心的

lucre, Lucretius, lucubration, Luddite, ludicrous, ludicrously, ludicrousness, ludo, luff, luffa, lug, luge, luggage, luggage-rack, luggage-van, lugger, lugubrious, lugubriously, lugubriousness, lugworm, lull, lullaby, lumbago, lumbar, lumbar puncture, lumber, lumber-jacket, lumber-room, lumberjack, lumen, luminary, luminosity, luminous, luminously, lumme (also lummy), lump, lump sugar, lump sum, lumpish, lumpsum,