2 sentences

1. 封面缺损的书籍通常会被减价出售。

   fēng​miàn quē​sǔn de shū​jí tōng​cháng huì bèi jiǎn​jià chū​shòu.

   Books with damaged covers are usually sold at a discount.

   Source: Dong Chinese Dictionary

2. 先天性骨缺损需要通过手术进行修复。

   xiān​tiān​xìng gǔ quē​sǔn xū​yào tōng​guò shǒu​shù jìn​xíng xiū​fù.

   Congenital bone defects need to be repaired through surgery.

   Source: Dong Chinese Dictionary