Proterozoic
n. 元古代, 元古代岩\\na. 元古代的, 元古代岩的
🗣️ 情景例句
There's no doubt about that.
此事确定无疑。
You cannot clap with one hand.
孤掌难鸣。
That's OK. Can I borrow it, please?
没关系，我能借用一下吗？