数据交换的用法和样例：
例句
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在分时系统中，终端和其它设备进行一次数据交换，从而完成一个特定的动作或产生一个特定的结果。例如，输入客户的存款金额并修改客户的余额。
In systems with time sharing, an exchange between a terminal and another device that accomplishes a particular action or result; for example, the entry of a customer's deposit and the updating of the customer's balance.
