这是一份承诺书，针对武汉肺炎的预防措施。作为一名武汉市民，我 pledge myself to take necessary precautions to prevent the spread of new coronavirus. I will avoid close contact with others, wash my hands frequently, and wear a mask when going out. I will also make sure to cover my mouth and nose when coughing or sneezing to prevent the transmission of the virus. Let us work together to combat this pandemic and protect ourselves and our loved ones.