Page 1
A flood happens when water spreads into places that are usually dry.
洪水，就是水流进入了本来应该保持干燥的地方。正文预览
Page 2
Heavy rain is one common cause because more water falls than the ground and drains can handle.
暴雨是常见原因之一，因为下来的水太多，地面和排水系统一下子处理不过来。
Page 3
If the soil is already full of water, new rain cannot soak in well and runs across the surface instead.
如果土地本来就已经吸满了水，新下来的雨就更不容易渗进去，只能在地表上流动。
Page 4
Rivers can flood when too much water flows into them from rain, melting snow, or upstream areas.
河流也会因为暴雨、融雪，或者上游来水太多而涨出河道。
Page 5
Cities can flood faster because roads and buildings leave less open soil for water to enter.
城市里地面更容易积水，是因为道路和建筑太多，留给雨水渗入土壤的地方更少。继续看同类型内容
