Paleozoic
a. 古生代的\\nn. 古生代
✅ 同义词
🗣️ 情景例句
We have 5 international patents which we are ready to sell.
我们有五项国际专利可以出售。
We shouldn't have any trouble if the traffic isn't to heavy.
如果交通不太拥挤的话，我们不会有什么困难。
What's in it?
里面是什么东西？