Graphene
n. 石墨的单原子层
🗣️ 情景例句
If you want to adopt an animal,
如果你想收养动物，
We continued to struggle up the steep slope of the mountain.
我们为了攀登山的陡坡，不断地倍尝辛劳。
In a few minutes he returned with my bag and gave it back to me.
一会儿工夫他拿着我的提包回来了，把它还给了我。