The date of manufacture of the jewellery has not been authenticated.
些珠宝的制造日期尚未经证实。
的
态: authenticated, authenticating, authenticates 
;证者;
置;The date of manufacture of the jewellery has not been authenticated.
些珠宝的制造日期尚未经证实。
The museum made the mistake of accepting the painting before it had been authenticated.
博物馆在还未确
画的真实性之前就错误地把它接受了。
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