1570s, "above value," from in- (1) "not" + value (v.) "estimate the worth of" + -able. It also has been used in a sense "without value, worthless" (1630s).
权威例句
1. 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。
2. The book is an invaluable aid to teachers of literature.
这本书对于教授文学的老师来说帮助非常大。
3. 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。
4. Breast self-examination is invaluable for detecting cancer in its very early stages.
乳房自检对早期癌症的发现是极为重要的。
5. The video has become an invaluable teaching tool.
【valueless, invaluable】
valueless: a.没有价值的,相当于worthless。
• That bracelet is a cheap, valueless piece of jewelry. 那个手镯是一件便宜的、不值钱的首饰。
invaluable: a.无价的,非常宝贵的,相当于priceless。
• Your help in moving the big refrigerator was invaluable. 你帮忙搬那个大冰箱,你的帮助是可贵的。