two attested copies of all relevant certificates/

两份相关证书的复印件

attested:

经检验证明无病的
经检验证明无菌的

例句与用法:
1. Her outstanding abilities were attested by her rapid promotion.
她杰出的才干已经由她获得迅速提升而得到证明.

2. His handling of the crisis attested to his strength of character.
他对危机的处理证明了他性格坚强.

3. The students' success attested to their ability.
学生们的成功证明了他们的能力。

4. Attested to their good faith.
证明他们的良好信誉

attested copy 证明副本

谢谢