attest
verb [ I or T ] formal uk/əˈtest/ us/əˈtest/
表明；证明；证实
to show something or to say or prove that something is true
Thousands of people came out onto the streets to attest their support for the democratic opposition party. 数以千计的人走上街头声援主张民主的反对党。
The number of old German cars still on the road attests (to) the excellence of their manufacture. 在马路上仍可以看到相当数量的老款德国车，这表明其制造工艺十分精良。
As his career attests, he is a world-class tennis player. 他是世界一流的网球选手，其职业生涯便是最好例证。
specialized The will needs to be attested (= officially marked to show that the signature of the person who made the will is correct) by three witnesses. 此遗嘱需要有3个证人联署证明。