If you describe something as invaluable, you mean that it is extremely useful.
例句
I was able to gain invaluable experience over that year...在那一年里我有幸获得了非常宝贵的经验。The research should prove invaluable in the study of linguistics...该调查研究在语言学研究领域的重要性应该会得到证实。
英汉词典释义
adj.
无法估计的, 非常宝贵的,极有用的,无价的
The painting is invaluable.这幅画是非常珍贵的。A computer would have been invaluable for this job.一台计算机对这个工作的作用会是无法估计的。This information was invaluable to him.这个消息对他来说是非常宝贵的。