The bottle will replace some of the water that your toilet USES each time it flushes.
这个瓶子在你每次冲水的时候，会阻止住一些水。
2
Minimize the amount of water your toilet uses with each flush by putting a plastic bottle (a large pop bottle will do fine) filled with sand or gravel in the toilet tank.
想减少冲马桶时的用水量，你可以把一个装满沙子或小石子的塑料瓶（汽水瓶也可以），放在水箱里。
3
Take an empty two-liter soda bottle, wash it out, fill it with water, screw the lid on tightly and set it into your toilet tank, as far away from the flapper valve as possible.