secondary circuit的用法和樣例：
例句
- When the secondary circuit is open, the core flux is produced by the primary current only.
當次級電路開路時，鐵芯磁通量僅僅由初級電流產生。 - The CAI can visually demonstrate the action process of the secondary circuit, which is very helpful to improve experimental inching quality.
該課件能直觀地演示距離保護二次迴路的動態過程，時提高實驗教學質量是非常有幫助的。 - Power loss in the inducer would trigger the deck's playback circuit.
誘導器的電力流失會激發終端的回放迴路。
