丽声百科万花筒 · 丽声第三级
Making a Road
These machines make roads. All the machines have a job to do.
This machine makes a track for the road. This machine makes a hole for the pipes.
This machine makes the track flat. The road will go here.
This big truck takes the earth away. More trucks bring big stones. They tip the stones over the road.
This machine rolls over the stones. It makes them flat. This truck brings small stones and tar.
