steam cloud

例句：

1. 1.The steam cloud rose up from the river, shrouding the city in mist.
   从河中升起的蒸汽云把城市笼罩在雾中。
2. 2. The scientist observed the steam cloud as it formed and dissipated over the lake.
   科学家观察了蒸汽云在湖面上形成和消散的过程。
3. 3. The steam cloud was a sign of impending rain, and everyone knew to stay indoors.
   蒸汽云预示着即将下雨，每个人都知道要待在室内。