我们不得不将原有的线路全部拆除，从头再来。

We had to strip out all the old wiring and start again.

《牛津词典》

一新建：为新建造之建筑物或将原建筑物全部拆除而重行建筑者。

New construction: new construction of buildings, or total demolition existing buildings and construction of new buildings.

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结合实际工程，提出了开槽设暗梁的楼板加固方法，避免了全部拆除重建。

The strengthening method of digging groove and increasing hidden beam is proposed by combining an actual project, which avoids all of demolition and restitution.

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