本合同经双方签字盖章后即生效。的翻译：This contract is signed and sealed by both parties after the entry into force. 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 is signed and sealed by both parties after the entry into force.

This contract signs and seals after both sides namely becomes effective.

This contract shall enter into force upon signature by both parties.

This contract is signed and sealed by both parties after the entry into force.