真相大白how: adv. 1.怎样,怎么(=in what manner ...it: it2 pron. (sing. Nom. ...happen: vi. 1.发生,〔口语〕出现。 2.〔后接不定式〕偶然 ...how could this happen to me: 这怎么可能发生在我身上how did this happen: 怎么会这样下载手机词典可随时随地查词查翻译