Earlier reports of gunshots have not been substantiated.早先有关枪击的那些报道尚未得到证实。The results of the tests substantiated his claims.这些检验的结果证实了他的说法。The statement has never been substantiated.这一陈述从未得到证实....

substantiated的音标：...

v.用事实支持（某主张、说法等），证明，证实( substantiate的过去式和过去分词 )...