Statistical series
[医] 统计数列\\n[经] 统计序列
🧩 词语组成解析
🗣️ 情景例句
His studies haven't been inproving lately.
他的学业最近没什么进步。
It's very nice of you to come and see me off.
您来给我送行，真是太客气了。
What was the population of the more developed countries in 1950?
1950年较发达国家的人口是多少？