只要作以下比较不难看出：careless1.粗心的,疏忽的;草率的He made a careless mistake.他犯了一个粗枝大叶的错误.2.随便的;自然的He sat into a chair with careless ease.他随便往椅子里舒舒服服一坐.3.漫不经心的;...