Arithmetical progression
[经] 算术级数, 等差级数
🧩 词语组成解析
a. 算术的, 算术上的\\n[机] 算术的
progression
[prə'ɡrɛʃən]
n. （事件的）连续;一系列;发展，进展;<数>级数;
🗣️ 情景例句
They concluded that the goods were of good quality and proved no problem.
他们断定货物质地优良，并证明没有任何问题。
Where are the stairs?
楼梯在哪里呢？
No, she's much younger than I am. She only started here this term.
对，她年纪比我小得多。她是这个学期才进校学习的。