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
I can't wait, to see them!
我恨不得马上见到他们。
Neck and neck.
不分上下。
I have always regarded the country as something you look at through a train window, or something you occasional visit during the weekend.
总认为乡村是透过火车车窗看到的那个样了，或偶尔周末去游玩一下景象。