minimum-signal level

例句：

1. 1.The minimum signal level is set to ensure that all devices can receive the signal.
   最小信号水平被设定为确保所有设备都能接收到信号。
2. 2. In this case, the minimum signal level is too low to detect the target.
   在这种情况下，最小信号水平太低，无法检测到目标。
3. 3. To improve communication, we need to increase the minimum signal level.
   为了提高通信，我们需要提高最小信号水平。