Sparse index
[计] 稀疏索引
🧩 词语组成解析
index
['ɪndɛks]
n. 索引;<数>指数;指示;标志;
vt. 给…编索引;把…编入索引;[经济学]按生活指数调整（工资、价格等）;
vi. [机械学]转位;
in(in)+dex(proclaim)→指针；索引；指数；食指；指标
🗣️ 情景例句
If you don't think it's any good, Please say so.
如果你认为写得不好，请照实说。
Where were you during the month of April last year?
去年四月份你在哪里？
Mmm, I see. It feels a bit tense. what happened exactly?
哦，我知道了。摸起来有点硬。到底发生了什么事？