Polyiron
多晶形铁, 树脂羰基铁粉
🗣️ 情景例句
He's quite a man.
他是个了不起的人。
I read a magazine in bed.
我躺在床上看杂志。
We continually wage war on them, for they contaminate our food, carry diseases, or devour our crops.
人类不断同昆虫斗争，因为昆虫弄脏我们的食物，传播疾病，吞噬庄稼。