2 sentences

1. 双方在关于新政策的辩论中正面交锋。

   shuāng​fāng zài guān​yú xīn zhèng​cè de biàn​lùn zhōng zhèng​miàn jiāo​fēng.

   The two sides clashed head-on in the debate over the new policy.

   Source: Dong Chinese Dictionary

2. 在这场围棋决赛中，两位选手进行了长达五小时的交锋。

   zài zhè chǎng wéi​qí jué​sài zhōng, liǎng wèi xuǎn​shǒu jìn​xíng le cháng​dá wǔ xiǎo​shí de jiāo​fēng.

   The two players engaged in a five-hour showdown during the Go final.

   Source: Dong Chinese Dictionary