1. He dressed causally for the job interview and didn't make a good impression.（他面试时穿得很随便，留下了不好的印象。）
2. She causally mentioned that she was going on vacation next week.（她随口提到她下周要去度假。）
3. He causally mentioned his new project, but didn't go into much detail.（他随便提了一下他的新项目，但没有多加说明。）