Upper bound
[计] 上界, 下限
🧩 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;
bound
[baʊnd]
vi. 跳，弹跳;限制;接壤;
vt. 给…划界，限制;使弹回，使跳跃;束缚;
n. 界限，限制;跃起;（球等的）反跳;
adj. 用带子绑住的;有义务的;装订的，有封面的;[化，物]结合的;
bound(to bind)→装订好的；必定；决心的；被束缚的
🗣️ 情景例句
He is not very interesting to talk to.
跟他谈话没味道。
Competition for this kind of goods is tough.
这种商品的竞争非常激烈。
The deer are farmed for their meat and fur, which are then shipped to many other countries.
饲养鹿的目的是为了获取鹿的肉皮，然后鹿皮会被轮船运往许多别的国家。