A commander, leader, or principal person, as in an organization or group.

指挥者；首领；主要人物；领袖；头目；主管；长官。

The principal or most important part.

主要部分。

principal; leading; main.

主要的；领袖的；最重要的。

Accorded highest rank or office.

阶级或职权最高的。

Chief indicates foremost or supreme.

Chief 指第一位或最高而：

When used in connection with a title or position it indicates rank.

如此字与头衔或职位连用则指高阶级而言：

Principal indicates importance.

Principal 指重要性而言：

Main refers to superiority in size, quantity, or extent.

Main 则指大小、数量或范围之优越性而言：