leitmotiv (also leitmotif)

n 1 (music 音) short, constantly repeated, theme in an opera, symphony, etc associated with a particular person, thing or idea 主导主题; 主旋律. 2 (fig 比喻) any recurring feature 反覆出现的特徵: The leitmotiv of her speech was the need to reduce expenditure. 她讲话中一再强调的就是需要削减开支.

legislation, legislative, legislator, legislature, legit, legitimacy, legitimate, legitimately, legitimation, legitimize, legitimize, legitimise, legless, legume, leguminous, lei, leisure, leisure centre, leisured, leisureliness, leisurely, lemming, lemon, lemon curd (also lemon cheese), lemon sole, lemon squash, lemon-squeezer, lemonade, lemur, lend, lend a helping hand to sb., lend itself to, lender, lending, length, lengthen, lengthily, lengthy, lenience, leniency, lenient,