3 sentences for 誓言 (shì​yán — pledge)

1. 两国的领导人誓言要加强合作。

   liǎng guó de lǐng​dǎo​rén shì​yán yào jiā​qiáng hé​zuò.

   Leaders of both countries pledged to strengthen cooperation.

   Source: Dong Chinese Dictionary

2. 他誓言要为国家尽忠，死而后已。

   tā shì​yán yào wèi guó​jiā jìn​zhōng, sǐ'ér​hòu​yǐ.

   He vowed to remain loyal to his country until his dying breath.

   Source: Dong Chinese Dictionary

3. 尽管在那场比赛中失利，但该队誓言明年卷土重来。

   jǐn​guǎn zài nà chǎng bǐ​sài zhōng shī​lì, dàn gāi duì shì​yán míng​nián juǎn​tǔ​chóng​lái.

   Despite losing that game, the team vowed to make a comeback next year.

   Source: Dong Chinese Dictionary