dignity
n.威严
With dignity and pride, our principal reached the end of his life.
我们校长带着庄严与骄傲与世长辞了。
dignify
vt.使有威严
We were dignified that the president joined us for dinner.
董事长和我们共进晚餐，让我们倍感荣耀。
differ
vi.不同，差异
People differ from one another in hobbies. =Hobbies vary with people.
嗜好因人而异。
limitation
n.限制（可数或不可数皆可）；缺点（可数）
The school authorities used to impose a limitation on the length of students' hair.
校方一度对学生头发的长度加以设限。
Basically, this is a good car, but it has its limitations.=Basically, this is a good car, but it has its shortcomings.
基本上这辆车不赖，不过仍有缺点。
limited
a.有限的
The strength of an individual is very much limited.
个人的力量是很有限的。
unlimited
a.无限的
Never think that natural resources are unlimited.
不要认为天然资源是源源不绝的。
civilization
n.文明（不可数）
These books are about the history of Western civilization.
这些书谈的是西方文明史。
conscience
n.良心
Everyone knows that Jim a conscientious worker.
大家都知道吉姆是个负责尽职的员工。
It makes one happy to complete a duty with conscience.
问心无愧地完成责任会让人快乐。
lecture
n.讲课 vi.授课 vt.向（某人）说教
A good student always pays attention to his teachers' lectures.
好学生总是专心听老师讲课。
Mr. Peterson lectures on British literature at Oxford University.
彼得森先生在牛津大学教授英国文学。
Our boss often lectures us about the importance of being punctual.
老板经常告诫我们准时的重要性。
lecturer
n.讲演者；讲师
Tina is a lecturer in cultural studies at Lancaster University.
蒂娜是兰开斯特大学教授文化研究的讲师。