🧩 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
How long does it take you to get through a letter?
你写一封信要花多少时间？
Our stock of this commodity is limited, please place your order without delay.
我方此类商品的存货有限，请尽快订货。
It is hard for us to realize nowadays how difficult it was for the pioneers.
我们今天很难想像昔日的登山先驱们是多么艰苦。