One person or thing of a number which make up a group.

个体；一个，一人。

The least whole number; one.

【数】最小之整数；一。

One undivided number or amount, as opposed to a fractional one.

【数】一个完整未分的数或量(分数之相对)。

Single group in an association or organization made up of groups.

(组成团体或组织的)单位。

A fixed amount, quantity, distance, etc. taken as a standard of measurement.

标准量；单位

Apparatus or machine having a specific purpose.

有特定功能的装置或机器。