preliminary warning notice

例句：

1. 1.The company issued a preliminary warning about the potential risks involved in the new project.
   公司发布了关于新项目潜在风险的初步警告。
2. 2.The government has issued a preliminary warning to citizens about the impending storm.
   政府已向市民发出关于即将到来暴风雨的初步警告。
3. 3.The research team received a preliminary warning from the experts about the possibility of contamination.
   研究小组从专家那里收到了关于可能受到污染的初步警告。