principal

adj.

1. 最重要的；主要的
   most important; main
   1. The principal reason for this omission is lack of time.
      跳过它的主要原因是时间不足。
   2. New roads will link the principal cities of the area.
      新建道路将连通这个地区的主要城市。

noun

1. 大学校长；学院院长
   the person who is in charge of a college or a university
   1. Principal Ray Smith
      雷∙史密斯校长
2. 大学校长；学院院长
   the person who is in charge of a college or a university
   1. Principal Ray Smith
      雷∙史密斯校长
3. 本金；资本
   an amount of money that you lend to sb or invest to earn interest
4. 主要演员；主角
   the person who has the most important part in a play, an opera , etc.
5. （尤指商务或法律事务的）当事人，委托人
   a person that you are representing, especially in business or law

1. ADJ 首要的；最主要的；最重要的
   Principal means first in order of importance.
   1. The principal reason for my change of mind is this.
      这是我改变主意的最主要原因。
   2. ...the country's principal source of foreign exchange earnings...
      这个国家最主要的外汇收入来源
   3. Their principal concern is bound to be that of winning the next general election.
      他们最关心的问题肯定是赢得下一次大选。
2. N-COUNT （中小学）校长；（英国）大学校长，学院院长
   The principal of a school, or in Britain the principal of a college, is the person in charge of the school or college.
   1. Donald King is the principal of Dartmouth High School.
      唐纳德·金是达特茅斯中学的校长。

1. A country's principal resource is its brainpower.
   一个国家的首要资源是其人才资源。
2. The two principal combustion products are water vapor and carbon dioxide.
   两种主要的燃烧产物是水蒸气和二氧化碳。
3. The principal range runs east to west.
   主体山脉呈东西走向。
4. The post of principal of the theatre school became vacant and he leapt at the chance.
   戏剧学校校长一职出缺，他马上抓住了这个机会。
5. City's principal marksman was Joe Harvey who scored seventeen goals.
   市队的头号射手是打进17粒进球的乔·哈维。
6. The students passed a motion of no-confidence in the college principal.
   学生们通过了对校长进行不信任投票的动议。
7. The principal reason for my change of mind is this.
   这是我改变主意的最主要原因。
8. Their principal concern is bound to be that of winning the next general election.
   他们最关心的问题肯定是赢得下一次大选。
9. Donald King is the principal of Dartmouth High School.
   唐纳德·金是达特茅斯中学的校长。
10. Stoppard had to recast four of the principal roles.
    斯托帕德只好更换4个主要角色的人选。
11. They were the principal shareholders in a bank riddled with corruption
    他们是一家腐败成风的银行的主要股东。
12. The details of the principal cause are not known.
    主因未详。
13. The principal criminal was sentenced to life imprisonment.
    这个主犯被判无期徒刑。
14. Ever since World War the United States has been Japan's principal trade partner.
    二次世界大战以来，美国一直是日本的主要贸易伙伴。
15. The principal keeps all our school reports on file.
    校长把我校的所有报告都存档保存.
16. A group of students asked to see the principal.
    一批学生要求见校长。
17. A school is a principal's jurisdiction.
    学校归校长管辖。
18. A principal criminal fell into the net.
    要犯落网。
19. The book was kindly and favourably reviewed in the principal papers.
    这本书得到几家主要报纸的赞许和好评。
20. The boys like the principal because he always plays fair.
    这些男孩们喜欢这位校长，因为他总是公平待人。
21. The principal adrenocortical products are aldosterone, cortisol and dehydroepiandrosterone sulphate.
    肾上腺皮质的主要产物为醛固酮、皮质醇和脱氢异雄酮硫酸盐。
22. The principal himself drafted this set of rules.
    这套规章是校长亲自拟稿的。
23. The principal came down hard on the boys for breaking the window.
    校长把那些打破窗户的男生狠狠地训了一顿。
24. When he saw the principal, he raised his hand in salute.
    他看到校长时举手敬礼。
25. On both large and small farms, one of the principal inhibitions to expansion of production can be insecurity of tenure.
    不论大农场或小农场，扩大生产的主要抑制因素可能是租地使用权缺乏保障。
26. The term 'vegetation type' designates the principal unit of major rank in Russian geobotany.
    在苏联地球植物学中，“植被型”一词是指主要高级单位。
27. Once this principal contradiction is grasped, all problems can be readily solved.
    抓住了这个主要矛盾，一切问题就迎刃而解了。
28. Thus the directions that emerge for extremizing the normal stress are the directions corresponding to the principal stresses.
    因此，产生最大正应力的方向就是相应于主应力的方向。
29. I met the principal and all.
    我见到了校长和所有的人。

noun

1. the major party to a financial transaction at a stock exchange

   Synonym:    dealer

2. the educator who has executive authority for a school
   1. she sent unruly pupils to see the principal

   Synonym:    school principalhead teacherhead

3. (criminal law) any person involved in a criminal offense, regardless of whether the person profits from such involvement

4. an actor who plays a principal role

   Synonym:    starlead

5. capital as contrasted with the income derived from it

   Synonym:    corpusprincipal sum

6. the original amount of a debt on which interest is calculated