Upper carboniferous
un. 上石炭统\\n
🧩 词语组成解析
upper
['ʌpə]
adj. 地位较高的;上面的;内地的;地表层的;
n. 鞋帮，靴面;兴奋剂;令人兴奋的经历;
n. 石炭纪, 石炭层\\na. 含碳或煤的
🗣️ 情景例句
How'd you do it?
是如何办到的？
Recently, I have learned a lot of new things about myself.
最近，我学到了许多自己以前不明白的事理。
I want to go shopping. Can you come with me, please? You can help me carry the things.
我想去商店买东西，你能和我一起去吗？你可以帮我拿点东西。