3 sentences for 长久 (cháng​jiǔ — lasting)

1. 两国之间建立了长久的友谊。

   liǎng guó zhī​jiān jiàn​lì le cháng​jiǔ de yǒu​yì.

   The two countries have established a long-lasting friendship.

   Source: Dong Chinese Dictionary

2. 两人靠着共同的兴趣维系着这段长久的友谊。

   liǎng rén kào zhe gòng​tóng de xìng​qù wéi​xì zhe zhè duàn cháng​jiǔ de yǒu​yì.

   The two of them maintain their long friendship through shared interests.

   Source: Dong Chinese Dictionary

3. 两人的性格实在不合，很难这样长久地将就下去。

   liǎng rén de xìng​gé shí​zài bù hé, hěn nán zhè​yàng cháng​jiǔ de jiāng​jiu xià​qù.

   Their personalities are truly incompatible, making it hard to keep settling like this for long.

   Source: Dong Chinese Dictionary