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在許多日本的廁所裏,洗手池是連在一起的,這樣你就可以洗手,並將水重複用於下一次沖水。日本這樣做每年節省了數百萬升的水。
On many Japanese toilets, the hand wash sink is attached so that you can wash your hands and reuse the water for the next flush. Japan saves millions of liters of water every year doing this.
from /r/interestingasfuck
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