Polycrystal
n. 多晶体\\n[化] 多晶
🗣️ 情景例句
Here's something for you.
这有东西送你。
Fine, thanks. And you?
很好，谢谢，你呢？
A long time ago, one of his ancestors who lived in Africa went into the forest to cut down a tree to make a drum.
很久以前，他那生活在非洲的祖先中有一人走进森林去砍树来做鼓。