first-hand

Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++ˌfirst-ˈhand (also firsthand) /ˌfɜːstˈhænd $ ˌfɜːrst-/ adjective [only before noun] first-hand experience/knowledge/account etc PERSONALLY/YOURSELFexperience etc that has been learned or gained by doing something yourself or by talking to someone yourself 亲身体验/直接得来的知识/第一手报道等 → second-hand journalists with first-hand experience of working in war zones 有战地工作经验的新闻记者 —first-hand adverb experience gained first-hand 亲身体验 → (at) first hand at first1(8)

Examples from the Corpus

first-hand• This letter remains the only first-hand account of life on the island in the 17th century.• Such beliefs are born out of first-hand experience and second-hand stories.• This understanding needs to be informed, up-to-date and backed by first-hand experience, not based on hearsay or second-hand impressions.• I had first-hand experience of that.• Millions of people across the world have first-hand experience of what it can do.• Clara knew from first-hand experience that living in a foreign country would be difficult.• International research tends to involve analyzing international data, rather than acquiring first-hand knowledge about international operations in other countries.• Besides, the people of Waterloo had first-hand knowledge of the advantages of public ownership.• Giving your children a first-hand look at your work can have a significant impact on their career aspirations.

ˌfirst-ˈhand adjectiveChineseSyllable

or learned been that experience by gained has Corpus etc

first-hand
ˌfirst-ˈhand

(also first‧hand) /ˌfɜːstˈhænd $ ˌfɜːrst-/ adjective [only before noun]
first-hand experience/knowledge/account etc experience etc that has been learned or gained by doing something yourself or by talking to someone yourself ⇨ second-hand: