3 sentences

1. 我军在边境线上的行动成功牵制了敌方的主力。

   wǒ jūn zài biān​jìng​xiàn shàng de xíng​dòng chéng​gōng qiān​zhì le dí​fāng de zhǔ​lì.

   Our army's actions on the border successfully pinned down the enemy's main forces.

   Source: Dong Chinese Dictionary

2. 助攻部队成功牵制了敌人的侧翼，配合主攻部队完成合围。

   zhù​gōng bù​duì chéng​gōng qiān​zhì le dí​rén de cè​yì, pèi​hé zhǔ​gōng bù​duì wán​chéng hé​wéi.

   The supporting troops successfully pinned down the enemy's flanks, helping the main force complete the encirclement.

   Source: Dong Chinese Dictionary

3. 由于缺乏资金，他的计划受到了极大的牵制。

   yóu​yú quē​fá zī​jīn, tā de jì​huà shòu​dào le jí​dà de qiān​zhì.

   His plan was greatly hampered due to a lack of funds.

   Source: Dong Chinese Dictionary