1. legitimate a. 合法的；正当的；合理的 Did he have a legitimate excuse for being late? 他迟到有个合理的解释吗？
2. liberal a. 慷慨的；开明的；不严格的 The government has taken a more liberal policy on issues of crime and punishment. 政府对犯罪及量刑采取了更加开明的政策。
3. likely a. & ad. 可能；可信的 Modern technology is likely to produce various ecological disasters. 现代技术可能导致各种不同的生态灾祸。
4. luxurious a. 奢侈的；丰富的 In the past, it was a luxurious dream for children in the poverty-stricken areas to receive formal education. 在过去，对于贫困地区的儿童而言，接受正规教育是个奢侈的梦想。
5. mandatory a. 命令的；强制的 Inspection of imported meat is mandatory. 对进口肉类的检查是强制性的。
6. mediocre a. 平庸的 Students shouldn’t spend much time reading mediocre paperbacks. 学生不应花大量的时间读拙劣的平装书。
7. metropolitan a. 大城市的 Museums and galleries are a necessity of their life. They contribute to the enrichment of people’s cultural life. 博物馆和美术馆是都市生活的必需品，有助于丰富人们的文化生活。
8. miserable a. 痛苦的；悲惨的；拙劣的 Millions of people still live a life in developing countries. They need international aid urgently. 在发展中国家仍有数以百万计的人们过着悲惨生活。他们急需国际援助。
9. misleading a. 使人产生误解的；引入歧途的；骗人的 Bad advice can be misleading. 不恰当的劝告可以把人引入歧途。
10. mistaken a. 犯错的；错误的 The rate of mistaken tasks would be minimized because you have learned lessons from long-time working experience. 你已经从长时间的工作中学到了许多经验教训，工作出错率将减少到最低程度。
11. mobile a. 易变的；机动的 People are becoming more mobile than before. They move to other places often for better employment or better environment. 人们的流动性比以前更大，他们经常为了更好的工作或更好的环境而搬家。
12. monotonous a. 单调的；毫无变化的 All they had to offer was some low-paid unskilled monotonous work. 他们只需提供一些报酬微薄，无需技巧性的单调工作。
13. moral a. 道德（上）的；精神的 International aid is a moral obligation for developed nations. 国际援助是发达国家的道德义务。
14. multilateral a. 多边的；多国的 All countries in the world should sign the multilateral agreement that cloning never be used on human. 世界上所有的国家都应该签署多边协定，禁止将克隆技术用于人类自身。
15. multiple a. 多个的；多种多样的 Every year car owners have to pay multiple fees to tax authorities: road tax, purchase tax, oil tax, etc.. This is a big drain on their resources. 车主每年都得向税务部门缴纳许多费用：养路费、购买税和油税等等。这对于他们来说是一大笔开支。
16. mutual a. 相同的；共同的 More academic exchanges and mutual visits will enable museums and galleries to learn from each other how to protect their collections and serve the public in a better way. 更多的学术交流和相互访问让博物馆和美术馆彼此学习如何更好地保护收藏品和为民众服务。
17. naïve a. 天真的；幼稚的 The writer was still naïve about critical power. 这位作家尚不知批评家的厉害。
18. nasty a. 龌龊的；下流的；恶劣的 The Internet censorship aims to protect the children from nasty contents. 互联网审查的目的是保护儿童免受不良内容的影响。
19. nationwide a. 全国性的 The police are to launch a nationwide campaign against illegal migration from April 1. 警方从4月1日起将展开全国性的打击非法移民的行动。
20. needy a. 贫困的 International aid means money and materials that are donated by international communities to help the needy. 国际援助就是国际社会捐助用于帮助穷人的钱物。
