charge and discharge board

例句：

1. 1. The new charge and discharge boardis more efficient than the old one.
   新的充电和放电板比旧的更高效。
2. 2. The engineer used the charge and dischargeboard to test the circuitry.
   工程师使用充电和放电板来测试电路。
3. 3. Thebattery pack on the charge and discharge boardneeds to be replaced soon.
   充电和放电板上的电池包需要尽快更换。