Proterozoicus
元古代
🗣️ 情景例句
When you see a new word, look it up.
当你看到一个新的字时就去查阅它。
He already has a phonograph,but he doesn't have a radio yet.
他已经有一架留声机，但是他还没有收音机。
Is this from our last shipment?
这是上次叫的货吗？