🧩 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;
🗣️ 情景例句
I'm worried about you and Mom.
我很担心你和妈妈。
Repetition is the mother of knowledge.
反覆学习是知识之源。
Several weeks after that, I will plant them in rows in the field.
再过几个星期，我还要把它们一行行地栽到菜地里。