learn off

记熟，背下来

leafstalk, leafy, league, leak, leakage, leaky, lean, lean out of, lean-to, leaning, Leaning Tower Pisa, leanness, leap, leap year, leap-frog, learn, learn by heart, learn by rote, learn from, learn of, learned, learnedly, learner, learner driver, learning, lease, leasehold, leaseholder, leash, least, leastways, leastwise, leather, leather-jacket, leatherette, leathery, leave, leave untouched, leave alone, leave behind, leave in the air,