?? 詞語組成解析
breadth
[br?dθ]
n. 寬度;寬容;（知識、興趣等的）廣泛;
index
['?nd?ks]
n. 索引;<數>指數;指示;標志;
vt. 給…編索引;把…編入索引;[經濟學]按生活指數調整（工資、價格等）;
vi. [機械學]轉位;
in(in)+dex(proclaim)→指針；索引；指數；食指；指標
??? 情景例句
What was your best subject in college?
大學時你哪門功課最好？
To push the wrong button
按錯了按鈕
Which would you prefer?
你要選哪個？