6 sentences

1. 掌声久久不息。

   zhǎng​shēng jiǔ​jiǔ bù​xī.

   The applause continued for a long time.

   Source: Dong Chinese Dictionary

2. 他紧握着我的手，久久没有松开。

   tā jǐn​wò zhe wǒ de shǒu, jiǔ​jiǔ méi​yǒu sōng​kāi.

   He held my hand tightly and didn't let go for a long time.

   Source: Dong Chinese Dictionary

3. 清晨，洁白的雾气冒于翠绿的山顶，久久不散。

   qīng​chén, jié​bái de wù​qì mào yú cuì​lǜ de shān​dǐng, jiǔ​jiǔ bù sàn.

   In the early morning, white mist rose over the emerald mountain peaks and lingered for a long time.

   Source: Dong Chinese Dictionary

4. 听到这个好消息，他内心澎湃，久久不能平静。

   tīng​dào zhè​gè hǎo xiāo​xi, tā nèi​xīn péng​pài, jiǔ​jiǔ bù néng píng​jìng.

   Hearing the good news, his heart surged with emotion and he couldn't calm down for a long time.

   Source: Dong Chinese Dictionary

5. 这种婵媛的情思一直困扰着他，使他久久不能释怀。

   zhè zhǒng chán yuán de qíng​sī yī​zhí kùn​rǎo zhe tā, shǐ tā jiǔ​jiǔ bù néng shì​huái.

   This lingering sentimental attachment has been troubling him, making it impossible for him to let go for a long time.

   Source: Dong Chinese Dictionary

6. 这段感情的破裂给他带来了极大的痛楚，久久不能释怀。

   zhè duàn gǎn​qíng de pò​liè gěi tā dài​lái le jí​dà de tòng​chǔ, jiǔ​jiǔ bù néng shì​huái.

   The end of this relationship caused him great anguish, and he hasn't been able to move on for a long time.

   Source: Dong Chinese Dictionary