Arithmetical series
[机] 等差级数
🧩 词语组成解析
a. 算术的, 算术上的\\n[机] 算术的
🗣️ 情景例句
What's wrong with wanting to be on the school board?
想进入联合校董会有什么错？
You're sure of passing the exam if you work hard.
只要用功，主汪定能考及格。
Thank you, Polly! laughed Ann.What a beautiful present! I can wear it in my new hat.
“谢谢你，波利！”安笑着说。“多么美丽的礼物啊！我可以把它插在我的新帽子上。”