Orthonik
[冶]镍铁磁心材料
🗣️ 情景例句
At four o'clock,
四点钟，
Then, all of a sudden, it became cloudy and began to rain.
可是突然天就变了，乌云密布并下起雨来。
Is the contract all right now?
契约现在这样可以了吧？