长久 + 的 + Noun
长久 (chángjiǔ) means long-lasting, enduring, or permanent. It describes something that persists over a significant period of time and is often used to express durability or the hope that something will continue indefinitely.
希望我们的友谊能够长久。
Xīwàng wǒmen de yǒuyì nénggòu chángjiǔ.
I hope our friendship can last a long time.
这样的好天气不会长久的。
Zhèyàng de hǎo tiānqì bù huì chángjiǔ de.
Such nice weather won't last long.
想要长久地保持健康,就得坚持锻炼。
Xiǎng yào chángjiǔ de bǎochí jiànkāng, jiù děi jiānchí duànliàn.
To stay healthy in the long run, you must keep exercising.