2 sentences

1. 维护宪法的尊严是每一个公民应尽的义务。

   wéi​hù xiàn fǎ de zūn​yán shì měi yī gè gōng​mín yīng jìn de yì​wù.

   Upholding the dignity of the constitution is an obligation for every citizen.

   Source: Dong Chinese Dictionary

2. 联合国宪章是维护世界和平的重要法律基石。

   Lián​hé​guó xiàn zhāng shì wéi​hù shì​jiè hé​píng de zhòng​yào fǎ​lǜ jī​shí.

   The UN Charter is an important legal cornerstone for maintaining world peace.

   Source: Dong Chinese Dictionary