radonil

例句：

1. 1. Radonil is a radioactive gas that can cause lung cancer.
   氡气是一种放射性气体，可能导致肺癌。
2. 2. The house was filled with the smell of radonil from the basement.
   地下室充满了氡气的臭味。
3. 3. Radonil testing is important for detecting hidden health risks.
   氡气检测对于发现隐藏的健康风险很重要。