求翻译：本合同的更改及未尽事宜，由双方当事人以书面形式签订补充协议，本补充协议自双方法定代表人或法定代表授权代表签字并加盖单位公章之日起生效。是什么意思？

Changes and matters of this contract, supplemental agreement was signed by the parties in writing of the supplemental agreement signed by authorized representatives from both sides of the legal representative or legal representative and affix the official seal of the date.

This contract change, and still unresolved, the parties entered into a written agreement, the agreement between the parties legal representative or authorised representative signature of authorized representative and the date of its official seal units.

This contract change and not the completely matters concerned, by the both parties by the written form sign subsidiary agreement, this subsidiary agreement are authorized representative from the bilateral legal representative or member as of right to sign and to cap date of activation the unit offic

Changed and unfinished business of this contract, signed a supplementary agreement in writing by the parties, this agreement from the legal representative of the legal representative or authorized representatives of both parties signed and stamped with the official seal from the date of entry into f

正在翻译，请等待...