Polyiron
多晶形铁, 树脂羰基铁粉
🗣️ 情景例句
Before the barbeque let's sharpen all the knives.
烧烤之前先把刀磨一磨。
Greatest genius often lies concealed.
大智若愚。
Oh, I live in a small village outside the city.
噢，我住在城外一个小村的一幢房子里。