Firearmor
镍铬铁锰合金
🗣️ 情景例句
I would like to send this by registered mail, please.
我想把这封信挂号寄出。
As the touchstone tries gold, so gold tries man.
试金石可以试金，正如黄金可以试人。
I had to sit up all night writing the report.
我不得不熬通宵写报告。