Extensive repair work is being carried out.

大规模的修缮工作正在进行。

《牛津词典》

Some are ruins and need full or partial restoration, and many interiors require extensive repair and refurbishment.

有些是废墟，有些需要全部或部分修缮，许多内饰需要大量的维修和翻新。

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The list of things that need repair is extensive.

清单上需要修理的东西非常多。

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Traditional surgery can be more effective because it allows more extensive repair of surrounding tissue, surgeons say.

WSJ: New Surgical Option for Heartburn

Extensive repair work cannot take place immediately due to the badger breeding season, which lasts until about June.

BBC: Badger sett causes Herefordshire bridge to be closed

The Lada was an obsolete Fiat, produced at the Togliatti factory south-east of Moscow: bought new, it required extensive repair in order to become roadworthy.

ECONOMIST: Soviet cars