Index constraint
[计] 下标约束
🧩 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
you're going to give me the answer to that question.
是要给我这个问题的答案。
What time does the first train to Boston leave?
第一班去波士顿的列车什么时间开出呢？
they had escaped from the paper bag and had taken complete possession of the hall!
它们从纸袋里逃了出来，爬得满厅都是！