求翻译：由于法律的规定往往落后于社会实践，对于这些交易中当事人的权利和义务，法律并未作出规定。根据契约自由原则，对于这些新型的交易行为，尽管法律上未加规定，但仍然应当认可其效力，对当事人双方都有约束力是什么意思？

Because the law often lags behind social practice, the parties to these transactions, the rights and obligations, the law does not make provision. According to the principle of freedom of contract, for these new transactions, even though the law is not rules and regulations, but still should be reco

Due to legal provisions are often lagged behind in social practice for these transactions, the rights and obligations of the Parties, the law does not make provisions. In accordance with the principle of freedom of contract, and these new types of transactions, although did not legally cover it, but

Because the legal stipulation often falls behind the social practice, regarding these transactions in litigant's right and the duty, the law makes the stipulation by no means.According to freedom of contract principle, regarding these new transaction behavior, although in the law has not added the s

Because of the provisions of the law frequently lags behind social practices, rights and obligations of the parties in these transactions, the law does not provide. According to the principle of freedom of contract, for these new types of transactions, despite legal provisions does not, but should s

Because the regulation of the law often lags behind social work, as to the party's right and obligation in the trade, the law has not made stipulations. According to the free principle of the agreement, as to these new trading activities, though has not added the regulation in law, but should still