Sieve problem
[计] 问题
🧩 词语组成解析
sieve
[sɪv]
n. [粮食][矿]筛子;滤网;不能保守秘密的人，嘴不严的人;
v. 筛，筛选;滤;
🗣️ 情景例句
It's so calming.
好宁谧 。
A lazy sheep thinks its wool heavy.
懒羊嫌毛重
How long have you lived there?
你在那里住多久了？