Permian
a. 二叠纪的, 二叠纪岩的\\nn. 二叠纪(岩)
🗣️ 情景例句
You haven't answered my question.
你还没有回答我的问题呢。
This window is just as high as thsat one.
这扇窗户刚好和那扇一样高。
the main complicating facts of human life must remain unintelligible.
我们才能明白人类生活中主要的复杂现象。