Backward difference operator
[计] 后向差分算子
🧩 词语组成解析
🗣️ 情景例句
I'm looking forward to the weekend.
我在期待着周末的到来。
What kind of grades did you make in college?
你在学院得到什么样的等级？
The reader's hair stands on end when he reads in the final pages of the novel that the heroine a dear old lady who had always been so kind to everybody, had, in her youth, poisoned every one of her five husbands.
当读者到小说最后几页了解到书中女主人公，那位一向待大家很好的可爱的老妇人年轻时一连毒死了她的5个丈夫时，不禁会毛骨悚然。