Upper bound expression
[计] 上界表达式
🧩 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
Ladies and gentlemen,
各位女士， 各位先生，
I'd like to make an overseas call to Taibei, Taiwan by collect call.
我要打对方付费的电话到台湾的台北。
Mr and Mrs Shute were very sad. But what could they do?
舒特先生和夫人非常难过。但他们有什么办法呢？