4 sentences

1. 由于对手弃权，这场比赛的胜负已成定局。

   yóu​yú duì​shǒu qì​quán, zhè chǎng bǐ​sài de shèng​fù yǐ chéng dìng​jú.

   The outcome of the match became a foregone conclusion after the opponent withdrew.

   Source: Dong Chinese Dictionary

2. 由于膝盖严重受伤，他不得不选择弃权，退出决赛。

   yóu​yú xī​gài yán​zhòng shòu​shāng, tā bù​dé​bù xuǎn​zé qì​quán, tuì​chū jué​sài.

   Due to a serious knee injury, he had to withdraw and forfeit the final.

   Source: Dong Chinese Dictionary

3. 他声明弃权，放弃了对这项遗产的继承权。

   tā shēng​míng qì​quán, fàng​qì le duì zhè xiàng yí​chǎn de jì​chéng​quán.

   He declared a waiver, giving up his inheritance rights to this estate.

   Source: Dong Chinese Dictionary

4. 表决结果为十票赞成，一票反对，两票弃权。

   biǎo​jué jié​guǒ wéi shí piào zàn​chéng, yī piào fǎn​duì, liǎng piào qì​quán.

   The vote resulted in ten in favor, one against, and two abstentions.

   Source: Dong Chinese Dictionary