Nested sets
[计] 嵌套集合
🧩 词语组成解析
nested
[nestɪd]
adj. 嵌套的;
v. 筑巢( nest的过去式和过去分词 );
n. 集合, 设置（set的复数）
🗣️ 情景例句
Don't forget to write.
别忘了给我写信。
What's the capital of your country?
贵国首都是哪儿？
Are there any flowers in the picture?
画里面有花吗？