They also rebuilt parts of the sewer system and improved water treatment centers.

他们还重建了部分下水道系统，并改善了水处理中心。

They were very lonely and had gone to live with the Elsings who had rebuilt the damaged part of their home.

他们感到十分孤独，只得去和埃尔辛一家住在一起，后者总算把自己房子的损坏地方修复了。