Selective index
[计] 选择下标, 选择索引
🧩 词语组成解析
selective
[si'lektiv]
adj. 精心选择的;选择的，不普遍的;淘汰的;
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
Both are equally effective.
两者都有效。
The old man fumbled with the key in the dark.
老人在黑暗中摸索着寻找钥匙。
He was obviously very nervous and for some minutes stood awkwardly before the microphone.
他显然非常紧张，局促不安地在麦克风前站了好几分钟。