vt.拍,打,掴;
n.掌掴(声);海洛因;(打的)一拳;打巴掌;
adv.直接地;准确地;猛烈地;急剧地;
例句:
This foolish act went smack against the rules.
这种愚蠢行动直接触犯了规章.
a smack on the jaw
在下巴上打了一拳
She smacked her hand down on to the table.
她啪地一拍桌子。