level

n.水平面；等级 a.平的，水平的

let...down, lethal, lethally, lethargic, lethargically, lethargy, letter, letter of credit, letter-bomb, letter-box, letterhead, lettering, letterpress, letters, letting, lettuce, leucocyte (US leukocyte), leucotomy, leukaemia (US leukemia), levee, level-crossing, level-headed, levelheaded, leveller (US leveler), lever, leverage, leveret, leviathan, Levis, levitate, levitation, levity, levy, lewd, lewdly, lewdness, lexical, lexically, lexicographer, lexicographical,