1. knocking copy （在广告中对竞争对手产品进行批评的）诋毁性广告文字
例句：The advert containing knocking copy has been withdrawn.
这则含有诋毁竞争对手产品字眼的广告已经被撤回。

2. know-how 专门技术、关键技术
例句：These products are the perfect combination of superb design and technological know-how.
这些产品将精美设计与专利技术完美地融合在一起。

3. key card system 钥匙卡系统（在酒店、公寓中一种由电脑控制的开锁系统）
例句：Many hotels are trying to increase security by using a key card system which records every time a lock is opened and by
whom
许多酒店试图通过使用钥匙卡系统提高客房安全，这种系统能自动记录每次开锁以及开锁人的情况。

4.knowledge management 知识管理（用来指企业和机构怎样确认和管理各种情报资源，以达到商业上的目标，这些资源包括来自各种渠道的资
讯，雇员共有的技术和使用的手段，甚至是林林总总的规章和程序）。

5. knowledge of the business 专业知识
例句：For leaders, knowledge of the business means good knowledge about the company, industry and technical matters.
对领导者而言，专业知识意味着对本公司、本行业及其技术有很好的了解。

6. leadership training 领导技巧培训
例句：It’s a good idea to invest in a month or two of leadership training.
花上一、二个月的时间参加领导技巧培训，是个不错的主意。

7. legal action 法律诉讼
例句：Employers must take sufficient steps to protect non-smoking employees from tobacco smoke or they might be faced with legal action.
雇主必须采取足够措施，保护不吸烟员工免受香烟损害，否则他们将有可能面对法律诉讼。

8. ledge book 分类账
例句：All aspect of bookkeeping are covered, including sales and ledge books, petty cash and final accounts.
课程内容涵盖了记账的所有方面，包括销售额和分类账，小额现金及决算账目。

9.lecture theatre 梯形教室，梯形报告厅

10.legal aid 法律援助
例句：She was eligible for legal aid.
她有资格获得法律援助。