Permian period
un. 二叠系；二叠纪\\n
🧩 词语组成解析
a. 二叠纪的, 二叠纪岩的\\nn. 二叠纪(岩)
period
['pɪrɪəd]
n. 时期;（一段）时间;学时;句号;
adj. 具有某个时代特征的;（关于）过去某一特定历史时期的;（家具、服饰、建筑等）某一时代的;
peri周围，靠近+od道路→周期
🗣️ 情景例句
How were your scores in university?
你大学时的成绩如何？
I don't know the answer, but let me ask Mr. Chen to comment on that.
我不知道答案，让我问一下陈先生看他有什么看法。
Then, her composure regained, she was ready to set off with the porter's assistance to search for nay intruders who might still be lurking in her flat.
此刻老妇人也镇定了下来，准备在看门人的协助下搜寻可能仍躲藏在她房里的窍贼。