原因是，无线装置要发送数据并等待来自接收数据的另一个无线装置的应答。
The reason is that one radio will send out data and wait for an acknowledgment from the other radio that the data was received.
如果无线发送装置在一定时间内收不到应答，就假定数据丢失，并且将重新发送数据。
If the transmitting radio doesn't receive the acknowledgment in a certain amount of time, it will assume that the data was lost, and it will resend it.
该装置可包括具有药物溶液储存部分的活性电极组件，以及非活性电极组件，该药物溶液储存部分含有免疫应答增强剂或其聚合物。
The device may include an active electrode assembly having a drug solution holding portion, comprising an immune response-enhancing agent, or composition thereof; and a non-active electrode assembly.
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