好累,喝杯水去~
It's convenient for us when we have bicycles.It can take the place of walking,making us arrive somewhere more quickly.It's convenient to use a bicycle and its structure is nice and the price is cheap,too.Not only can we save much time but also we can build up our bodies by regarding it as a kind of sport.Besides,it is less contaminative.
We will feel tired to walk without a bicycle.If so,then it will be a waste of time and may cause many losses.We can draw a conclusion that the invention of bicycle really does good to our daily life,making us live a better life.