高一英語作文：A Water Clock550字

The water clock has three the left is a tank holding tank has a narrow opening through which water drips into a second container,also a de the second tank is a floating object,to the end of which is attached a long pole with an the right is a cylinder with the numbers one to twelve written on the water from the tank on the left drips into the second tank,the level rises and with it the lfoating causes the arrow to move from one number to the thus has a twelve hour r twelve hours the second tank is emptied and the process is begun again.