2 sentences

1. 这件古董在经过数十轮竞价后，最终以高价成交。

   zhè jiàn gǔ​dǒng zài jīng​guò shù​shí lún jìng​jià hòu, zuì​zhōng yǐ gāo​jià chéng​jiāo.

   After dozens of rounds of bidding, this antique was finally sold at a high price.

   Source: Dong Chinese Dictionary

2. 商家之间激烈的竞价导致了该行业的利润空间不断缩小。

   shāng​jiā zhī​jiān jī​liè de jìng​jià dǎo​zhì le gāi háng​yè de lì​rùn kōng​jiān bù​duàn suō​xiǎo.

   Intense price competition among merchants has led to shrinking profit margins in the industry.

   Source: Dong Chinese Dictionary