不知道适不适合、自己再改动改动吧the first time that i learn how to ride the bicycle was tough.When i steped on the pedal,i totally lost control.I tried very hard to solve the problem i face.i had fell... 不知道适不适合、自己再改动改动吧the first time that i learn how to ride the bicycle was tough.When i steped on the pedal,i totally lost control.I tried very hard to solve the problem i face.i had fell...