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
Have you ever been to Guangzhou?
你以前来过广州吗？
Excuse me, can you alter this jacket for me?
请原谅，你能替我修改这件短上衣吗？
When you have found a building in which to start your school.
你找到开办学校的楼房后