invaluable
adj. 极有用的，极宝贵的
例句
In his job, patience is an invaluable asset.
他干的这份工作，耐心是无价之宝。
《牛津词典》
I was able to gain invaluable experience over that year.
在那一年里我获得了十分宝贵的经验。
《柯林斯英汉双解大词典》
His help can prove invaluable.
他的帮助是无价的。
