如今履行义务或保证就，是作出承诺，意志记忆的位置，控制于他所谓的承诺之权。

Now since undertaking an obligation or commitment is like making a promise the position of a memory of the will under rides what he calls the right to make promises.

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作为保证偿还债务或履行义务的担保而给予或持有的东西。

Pledge Something given or held as security to guarantee payment of a debt or fulfillment of an obligation.

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译文：如果时间允许，欲宣告合同无效的一方当事人必须向另一方当事人发出合理的通知，使其可以对履行义务提供充分保证。

If time allows, the party intending to declare the contract avoided must give reasonable notice to the other party in order to permit him to provide adequate assurance of his performance.

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