国难当头
      Explanation: Countries are facing a huge disaster.
      Source: Lu Xun, "A Xu Maoyong and on the anti-Japanese united front" in the present national crisis, the day I talked about some high-sounding words ... ... not what these people do. "
      Examples: In the ~ present during the day in some high-sounding words about ... ... not what these people do. (Lu Xun, "A Xu Maoyong and on the anti-Japanese united front")