Polyiron
多晶形铁, 树脂羰基铁粉
🗣️ 情景例句
Well, I don't think it's anything serious.
嗯，我想没有什么严重的。
Would Dr.Block be able to see me at 9:30 tomorrow?
明天9点半布洛克医生能给我看病吗？
and some of these propositions have been violently opposed.
对风俗的研究才是全面的，才会有收获。