4 sentences for 顽强 (wán​qiáng — unyielding)

1. 战士们正在顽强对抗敌人的进攻。

   zhàn​shì men zhèng​zài wán​qiáng duì​kàng dí​rén de jìn​gōng.

   The soldiers are tenaciously resisting the enemy's attack.

   Source: Dong Chinese Dictionary

2. 英勇的战士们正在前线顽强作战。

   yīng​yǒng de zhàn​shì men zhèng​zài qián​xiàn wán​qiáng zuò​zhàn.

   Brave soldiers are fighting tenaciously on the front lines.

   Source: Dong Chinese Dictionary

3. 面对强大的对手，他们展开了顽强的抵抗。

   miàn​duì qiáng​dà de duì​shǒu, tā​men zhǎn​kāi le wán​qiáng de dǐ​kàng.

   Facing a powerful opponent, they put up a stubborn resistance.

   Source: Dong Chinese Dictionary

4. 面对敌军的进攻，守城部队进行了顽强的抵抗。

   miàn​duì dí​jūn de jìn​gōng, shǒu​chéng bù​duì jìn​xíng le wán​qiáng de dǐ​kàng.

   Faced with the enemy's offensive, the defending troops put up stiff resistance.

   Source: Dong Chinese Dictionary