I am a clock,but not a normal clock. I am not drived by cells, nor gears.So,what am I drived by? So simplly,the salt water.
It is easy to make me to work. Only filling some salt water in my "stomache"according to the introduction, I will work happily, since I am full now. Enviromental protection is a fashion now, I follow the step of fashion by abandoning the cell. Besides, if you put me in your house, it would be a sign of good test.