cir.caprep.Abbr. ca,c.,C.(介词)缩写 ca,c.,C.In approximately; about:近似;大约:例句:born circa 900.生于900年左右来源:Latin circ3 拉丁语 circ3 from circum [around] 源自 circum [在…附近] from circus [circle] * see circle 源自 circus [环绕] *参见 circle