lubrication

n.润滑

lowland, lowlander, lowliness, lowly, lowness, loyal, loyalist, loyally, loyalty, lozenge, LP, LSD, LST, Lt, LTA, Ltd, lubber, lubberly, lubricant, lubricate, lubricious, lucerne, lucid, lucidity, lucidly, luck, luckily, luckless, lucky, lucky dip, lucrative, lucratively, lucrativeness, lucre, Lucretius, lucubration, Luddite, ludicrous, ludicrously, ludicrousness,