2 sentences

1. 这批产品的废品率非常高。

   zhè pī chǎn​pǐn de fèi​pǐn lǜ fēi​cháng gāo.

   The rejection rate for this batch of products is very high.

   Source: Dong Chinese Dictionary

2. 他靠在北京走街串巷收购废品为生。

   tā kào zài Běi​jīng zǒu​jiē​chuàn​xiàng shōu​gòu fèi​pǐn wéi​shēng.

   He makes a living by going through the streets and alleys of Beijing to collect recyclables.

   Source: Dong Chinese Dictionary