Singleton substitution
[计] 唯一替换
🧩 词语组成解析
n. 一个, 独生子, 独身
substitution
[ˌsʌbsti'tju:ʃən]
n. 代替;代用;替换;<化>取代（作用）;
🗣️ 情景例句
Did you bring your transcript from high school?
你把高中的成绩单带来了吗？
Which one is more economical?
哪一个是比较经济的？
but other farms are less favorably sited, and flooding can sometimes spell disaster for their owners.
其他农场地势欠佳，洪水有时会给农场主带来灾难。