The date of manufacture of the jewellery has not been authenticated.
这的制造日期尚未经证实。
The date of manufacture of the jewellery has not been authenticated.
这的制造日期尚未经证实。
The museum made the mistake of accepting the painting before it had been authenticated.
博物馆在还未这幅画的真实性之前就错误地把它接受了。
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