The tower will save so-called gray water from washrooms and use it to flush the toilets.

大楼将节约来自洗手间的被称之为的灰水，用于冲厕所。

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The tower will save so-called gray water from washrooms and use it to flush the toilets.

大楼将节约来自洗手间的被称之为的灰水，用于冲厕所。

youdao