Manganal
合镍高锰钢
🗣️ 情景例句
How many classes are you taking this semester?
这学期你有多少课？
She's very well,thank you.
她很好，谢谢您。
The man had connected the air-line to a supply line of oxygen, not compressed air.
这个工人把供气管接到了氧气供应管上，而不是接到压缩空气管上。