chief 拽人时，表同类中职位最高，权力最大；指物时，表同类中最重要，价值最高。
principal 用于人时，指地位优于其他人；用于物时，指该物在大小、重要性等方面优于他物。
main 通常只用于物。指在一定范围内，某物的重要性、体积或力量等超过其它物。
major 指同其他人或其它物、问题等相比较，显得更加重要和突出。
leading 侧重指具有影响力或凝聚力。从而有主导和引导的作用。
capital 着重指因重要性、意义、优越或重大而名列同类之首。
foremost 侧重指在行进或发展过程中居首位。
primary 通常不用于人。用于物时，指在重要性方面占第一位。
参考例句
1. Because the body is your own capital. 因为身体才是你自己的本钱。
2. It includes the capital, money stock markets. 它包括资金、货币和股票市场。
3. Speaking is the capital way of communication. 在交流中说话是首要的方式。
英英解释
n.
1. assets available for use in the production of further assets
2. wealth in the form of money or property owned by a person or business and human resources of economi
3. a seat of government
4. one of the large alphabetic characters used as the first letter in writing or printing proper names
5. a center that is associated more than any other with some activity or product
6. the federal government of the United States
7. a book written by Karl Marx (1867) describing his economic theories
8. the upper part of a column that supports the entablature adj.
1. first-rate
2. of primary important
3. uppercase
