simulated fall-out

例句：

1. 1.The government has simulated a fall-out from the nuclear disaster to prepare for emergency response.
   政府已经模拟了核灾难后的放射性物质泄漏，以备紧急响应。
2. 2.The scientists conducted a simulated fall-out test to assess the effectiveness of their new radiation shield.
   科学家们进行了一次模拟放射性物质泄漏测试，以评估他们新研制的辐射防护盾的效果。
3. 3. Due to the simulated fall-out, many people were forced to stay indoors and avoid going out.
   由于模拟的放射性物质泄漏，许多人被迫呆在家里，避免外出。