4 sentences

1. 各国都应该遵守国际法。

   gè guó dōu yīng​gāi zūn​shǒu guó​jì​fǎ.

   Every country should abide by international law.

   Source: Dong Chinese Dictionary

2. 国际法严禁在战争中使用童子军。

   guó​jì​fǎ yán​jìn zài zhàn​zhēng zhōng shǐ​yòng tóng​zǐ​jūn.

   International law strictly prohibits the use of child soldiers in war.

   Source: Dong Chinese Dictionary

3. 联合国宪章是国际法的重要组成部分。

   Lián​hé​guó xiàn​zhāng shì guó​jì​fǎ de zhòng​yào zǔ​chéng bù​fen.

   The Charter of the United Nations is an important part of international law.

   Source: Dong Chinese Dictionary

4. 战争中，保护平民的安全是国际法的基本要求。

   zhàn​zhēng zhōng, bǎo​hù píng​mín de ān​quán shì guó​jì​fǎ de jī​běn yāo​qiú.

   In war, protecting the safety of civilians is a basic requirement of international law.

   Source: Dong Chinese Dictionary