2 sentences

1. 这家商店承诺只售卖原装正品。

   zhè jiā shāng​diàn chéng​nuò zhǐ shòu​mài yuán​zhuāng zhèng​pǐn.

   This store promises to sell only genuine, original products.

   Source: Dong Chinese Dictionary

2. 这家工厂的正品率一直保持在百分之九十八以上。

   zhè jiā gōng​chǎng de zhèng​pǐn lǜ yī​zhí bǎo​chí zài bǎi​fēn​zhī​jiǔ​shí​bā yǐ​shàng.

   The yield of first-grade products at this factory has remained above 98 percent.

   Source: Dong Chinese Dictionary