These fanatics are in deadly earnest when they say they want to destroy all forms of government.这些狂热分子声称要摧毁所有形式的政府时,他们可不是说着玩,是完全当真的。English teachers often joked that they could not pass the exam, but for the students it was no laughing matter.英语老师经常开玩笑说他们不能通过这次考试,可是对学生来说那可不是说着玩的。That's enough, kids. I mean it! Cut it out!够了,孩子们。我可不是说着玩的!别闹啦!