鉴定英文：authenticate。
例句：
1、专家鉴定这字迹是拜伦的亲笔。
Experts have authenticated the writing as that of Byron himself.
2、这项新技术已被用来鉴定胎儿的性别。
The new technique has been used to identify the sex of fetuses.
3、这项化验能鉴定胎儿是否有不正常现象。
The test can identify the presence of abnormalities in the unborn child.
4、一种有助于中和水稻铝毒性的基因已经被鉴定出来。
A gene that helps neutralize aluminum toxicity in rice has been identified.
5、他说他完全可以鉴定这枚邮票。
He says he'll have no problem authenticating the stamp.
6、鉴定人员对这处房产做了估价。
Surveyors carried out a valuation of the property.
会发光的欧巴i
