greater flood

例句：

1. 1. The city was hit by a greater flood last year.
   去年这座城市遭受了一次更大的洪水袭击。
2. 2. The government is working on a plan to prevent future greater floods.
   政府正在制定计划以防止未来的更大洪水。
3. 3. The river has been rising due to the heavy rainfall, causing concern about potential greater floods.
   由于大雨，河流水位上升，引发了对潜在更大洪水的担忧。