adv.偶然地；隨便地，隨意地；漫不經(jīng)心地；非正式地

He casually leafed through the book . 他隨便翻閱著那本書。

She was dressed casually in jeans and a sweatshirt . 她隨便地穿著一條牛仔褲和一件運(yùn)動衫。

He casually flicked away some dust from his jacket. 他漫不經(jīng)心地把夾克上的灰拍掉。

He casually waved over the waitress and settled the bill. 他漫不經(jīng)心地向侍者揮手結(jié)賬。