最早的秘书人员称为“（）”。

The full title of the U.K. is the United Kingdom of （）and （）

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我国最早的秘书人员是（）。

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public and private colleges and universities and community colleges offer（）.

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（）is used for calling and replying,and for transmitting acknowleding and relaying distress alerts.

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The way in which people address each other depends on their age, sex, social group and personal relationship. The English system of address forms frequently used includes first name, last name, title+last name, （）, and kin term.

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装卸（Loading and Unloading）

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零点极点（zero and pole）

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零点极点 (z ero and pole)

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根轨迹方程 (magnitude and phase equations)

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