When we say these dates we say the numbers and letters :
One BC (One Bee Cee) - usually with the number first
Ninety-four AD (Ay Dee) or AD(Ay Dee) Ninety-four.
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BC is read , before Christ
AD is anno dominni, it sounds odd because this second one is latin¡¡¡
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These terms are slowly being replaced by BCE and CE: Common Era.