justification/justify
justification/ˌdʒʌstifiˈkeiʃən/n.［u］正当理由，借口：the moral justification道义上的正当理由；with full justification有充分理由地justify/ˈdʒʌstifai/vt.解释…是对的；说明…···
juvenile
juvenile/ˈdʒu:vinail/ I.adj.青少年的；幼稚的：a juvenile shock team少年突击队；juvenile books少年读物；a juvenile court少年法庭；juvenile behaviour幼稚的行为‖II.n.［c］青少年
keen
keen/ki:n/adj.1.热心的，渴望的（跟on、about、不定式）：a keen football player一个富有热情的足球运动员；a keen student富有热情的大学生I am not very keen on detective stories.我并不太···
keep
keep/ki:p/(kept /kept/, kept) I.vt.1.保存，保持，留住: Will you keep this book for me?你帮我保存一下这本书好吗? This can help to keep moisture in the soil.这可以帮助保持土壤中的水分···
kettle
kettle/ˈketl/n.［c］水壶：Put the kettle over/on the fire.把水壶放在火上。A watched kettle never boils.［谚］看着的水壶永不开。/心急水不沸。The kettle is singing.水壶响了。
key
key/ki:/ I.n.［c］1.钥匙(常与to连用，也可与of连用): use one’s key to open the door用钥匙开门Have you got the key to/of the door?你有这个门的钥匙吗? Knowledge is a treasure, but pr···
keyboard
keyboard/ˈki:bɔ:d/n.［c］(钢琴，打字机，计算机等)键盘：a standard keyboard一个标准键盘；a typewriter and a computer keyboard打字机键盘与计算机键盘The keyboard is your principal m···
kick
kick/kik/vt.&vi.踢：This horse kicks.这匹马好踢。kick in开始生效，开始发生：The new tax rate kicks in next month.新税率下月执行。kick off踢掉鞋；（足球）开脚；开始：She kicked ···
kid
kid/kid/n.［c］小孩，小伙子：college kid大学生；a lovely kid可爱的孩子；school kids学童Tell that kid to stop making so much noise.告诉那孩子小点声。
