adv.偶然地；随便地，随意地；漫不经心地；非正式地
He casually leafed through the book . 他随便翻阅着那本书。
She was dressed casually in jeans and a sweatshirt . 她随便地穿着一条牛仔裤和一件运动衫。
He casually flicked away some dust from his jacket. 他漫不经心地把夹克上的灰拍掉。
He casually waved over the waitress and settled the bill. 他漫不经心地向侍者挥手结账。
