数据存储单位bit(比特)是binary digit的英文缩写，量度信息的单位，也是表示信息量的最小单位，只有0、1两种二进制状态。
通过设置各种参数，您可以在不同时间，或用不同单位存储不同的数据值。
By setting various parameters, you can store different data values at different times, or in different units.
数据由称为硬件的专门设备来处理，这些设备包括输入装置，系统单位装置以及二级存储装置。
Data is processed by specific equipment that is often called computer hardware. This equipment consists of input devices, a system unit devices, and secondary storage devices.
域是数据存储的基本单位，每个域一般含有由数据库描述的属于实体的一个方面或一个特性的信息。
Fields are the basic units of data storage, and each field typically contains information pertaining to one aspect or attribute of the entity described by the database.
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