Permians
a. 二叠纪的\\nn. [地质] 二叠纪
🗣️ 情景例句
I really appreciate you coming over to help me with my math.
我真的很感谢你过来帮我补习数学。
Whatever he does, don't say a word.
不管他做什么，你都不要讲话。
The children compete against each other to reach the other end of the pool.
孩子们比赛看谁先到达游泳池的另一端。