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adj(1)偶然的，意外的(happening by chance;not planned)[尤作attrib]：a～meeting/encounter/visit偶遇/意外遭遇/偶然拜訪;〖同〗accidental，unexpected，unplanned，chance;〖反〗 intentional，planned，calculated，fixed，arranged，expected;

(2) 1)隨便地，不經(jīng)心地(made or done without much care or thought)[尤作attrib]：discover sth because of a～remark因?yàn)殡S便說(shuō)的一句話而發(fā)現(xiàn)什么; 2)不認(rèn)真(細(xì)致)的，馬虎的，粗心大意的(not serious or thorough)[尤作attrib]：take a～glance at a book漫不經(jīng)心地在書(shū)上掃了一眼;give sb a～look隨便看某人一眼;have a～interest in golf對(duì)打高爾夫球興趣不大;a～inspection 馬馬虎虎的檢查;a～observer/reader不經(jīng)心的觀察者/讀者; 3)漠不關(guān)心的，不負(fù)責(zé)任的(showing little interest;unconcerned;irresponsible)(derog)：His attitude/behaviour is rather～.他的態(tài)度/行為很不負(fù)責(zé)任。a～manner/air隨隨便便的樣子/神態(tài);a～host不熱情的主人;

(3)1)隨便的，非正式的((of clothes) not formal;suited for everyday wear or use)：～wear/clothes/dresses/attire隨便的穿戴/衣服/服裝/服裝;Her clothes were too～for the occasion.她的衣著對(duì)于這種場(chǎng)合太隨便了?！纪絠nformal;2)隨便的，不拘禮節(jié)的(without ceremony or formality)：address sb in a～way 隨便地對(duì)某人說(shuō)話;

(4)臨時(shí)的，不規(guī)律的(not regular or permanent;part-time)[作attrib]：a～labourer臨時(shí)工;employ～labours雇短工;take on～work打短工;～sex偶爾的兩性關(guān)系;

(5)不密切的(not close or intimate)：a～friendship交情不深的友誼;

(6)表面(不深)的(superficial)[作attrib]：a～acquaintance點(diǎn)頭之交;

→′casually adv 偶然(意外)地;隨便(馬虎，冷漠)地;臨時(shí)地;′casualness n 意外;隨便;

n(1)隨便的衣著(informal clothes，esp men's slip-on shoes)[pl];

(2)臨時(shí)工(person employed for a short period of time)[C]：He is a～.他是個(gè)臨時(shí)工。