the theory and practice o
的理论与实践
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Contract law should not only provide transaction equity, but also reduce transaction costs o as to promote transaction business. However, this function is ignored in the legal theory and practice.
合同法不仅应该保障交易安全，还应该降低交易成本，以促进交易，但合同法的这一功能在理论上和实践中受到忽视。
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