Perfect number
[计] 完全数
🧩 词语组成解析
🗣️ 情景例句
A man can develop his mind by reading.
读书增进个人的智慧。
How is her accent in French?
她的法语口音怎么样？
The bridge is so long that the shape of the earth had to be taken into account by its designer.
由于桥身太长，设计者不得不考虑了地表的形状。