Polyiron
多晶形铁, 树脂羰基铁粉
🗣️ 情景例句
Do you have any special hobbies?
你有什么特别的爱好吗？
John could not decide when to leave.
约翰无法决定几时要出发。
It was made in Germany in 1681.
是1681年德国造的。