🧩 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;
paleolithic
[ˌpæliəu'liθik]
adj. 旧石器时代的;
🗣️ 情景例句
But you may rest assured that the payment is guaranteed.
但是你尽可以放心，我们的付款是有保障的。
To top others
脱颖而出；获得第一
Up to now, historians have assumed that calendars came into being with the advent of agriculture, for then man was faced with a real need to understand something about the seasons.
历史学家迄今认为日历是随农业的问世而出现的，因为当时人们面临着了解四季的实际需要，