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
I could never sneak into the movies, that's just like stealing.
我不能偷偷溜进电影院，那跟偷东西没有区别。
It slipped my mind.
我不留神忘了。
When he asked if Mr.Lane lived there, the policeman on duty told him that since his defeat, the ex-Prime Minister had gone abroad.
当他询问莱恩先生是否住在那里时，值班的警察告诉他这位前首相落选后出国去了。