求翻译：　　3. 节省施工用水：现场使用临时水盆，洗手时水盆下水接入专用存水桶内，洗手水用于冲厕等。是什么意思？

　　3. construction water saving: field using temporary water basins, wash-basin into the water when you access a dedicated save buckets, wash-water used for flushing.