practicable /ˈpræktikəbl/ adj. 能实行的，行得通的：methods that are not practicable 不可实行的措施；a mountain pass that is practicable only in summer 仅在夏季可通行的山路
practical /ˈpræktikəl/ adj. 1.实际的：a fighter with practical experience 有实践经验的战士；practical activities 实践活动 2.实用的，可行的：a very practical idea(proposal)非常可行的意见（建议）；practical chemistry 实用化学
practically /ˈpræktikəli/ adv. 1.几乎，简直：practically impossible 简直不可能 It rained practically all night. 几乎整夜下着雨。 2.实际上；事实上： Practically speaking, such a view is wrong. 实际上，这种观点是错误的。
practice /ˈpræktis/ I. n. 1.［u］实践：Correct ideas come from social practice. 正确思想来自社会实践。It takes years of practice to acquire the skill of an expert. 要有专家的技能需要多年的实践。 in practice实际上：In theory this method is ideal—in practice it is unrealistic. 理论上这种方法很理想，——但实际上却不现实。2.实习，练习：do practice in speaking English练习讲英语; firing practice 实弹射击 Practice makes perfect.［谚］熟能生巧。out of practice 缺少练习或经验：I’m a bit out of practice but I’d love to play.我最近没有练习，但我喜欢玩。3. ［c］&［u］从事(职业): retire from practice退休 My lawyer has a very good practice.我的律师业务繁忙/生意好。 4.［u］执行: put/carry sth. into practice 实行(现)… ‖II. vi. (BrE: practise) 1. 练习：practice speaking English 练习说英语 2.开业：He is just beginning to practice as lawyer. 他正准备执行律师业务。
practise /ˈpræktis或ˈpræktiz/ vt. & vi. 实践，练习 （作vt.时接名词或v-ing）：practise with the rifle 练习打枪；practise shooting (running) 练习射击(跑步) You mustn’t practise the drums while the baby is sleeping.孩子睡觉时，请不要练习打鼓。You’ll never learn to ride a bike if you don’t practise. 如果你不练习，你就永远学不会骑自行车。
