Perlit
波利特铸铁, 珠光体铸铁
🗣️ 情景例句
I've got six months to go until graduation.
我还有六个月就毕业了。
Laugh before breakfast you'll cry before supper.
乐极生悲。
I don't want to know what it's been; I want to know what it is now.
我不想知道它曾经是什么；我想知道它现在是什么。