Graphene
n. 石墨的单原子层
🗣️ 情景例句
Is that all right with everyone?
各位有意见吗？
Have you taken a train?
你坐过火车吗？
Well, we can't take Polly with us. Could you look after her for me while we're away?
嗯，我们不带波利去。我们不在这里时，您能帮我照料它吗？