Polyiron
多晶形铁, 树脂羰基铁粉
🗣️ 情景例句
I have no definite ideas in that area right now.
在这方面目前我还没有具体的想法。
A small leak will sink a great ship.
一个小漏洞可能弄沉一艘大轮船。
Did she learn all by herself? How clever.
她全是自己学会的吗？多么聪明啊！