本合同一式两份，甲、乙双方各持一份，自签字之日起生效。的翻译：This contract in duplicate, each of a, b, from the date of signature to take effect. 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

This contract in duplicate, A and B sides, each carrying a copy of the date of signature.

This contract in duplicate, each of a, b, from the date of signature to take effect.

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This contract in duplicate, each of a, b, from the date of signature to take effect.