This is the 6411th most frequent Chinese word.
持久
Lasting; enduring.
In this sentence, '持久' (chíjiǔ) is used as an adjective to describe the characteristic of the luster, emphasizing its long-lasting nature.
这种涂料具有持久的光泽。
This type of coating has a lasting luster.
Here, '持久' is an adjective qualifying 'effort,' suggesting the need for persistence.
为了获得更好的结果，我们需要持久的努力。
To achieve better results, we need consistent effort.
'持久性' (chíjiǔxìng) demonstrates the adaptability of '持久' to form a noun by adding the suffix '-性', referring to the quality of being lasting.