求翻译：在签订本合同之前，买卖双方当事人可要求对方出示身份证明、企业法人营业执照、房地产证等有关证明文件，并认真审阅合同内容，仔细确认其中的选择性、补充性、修改性内容。对合同条款有疑问时，可向法律人士咨询。是什么意思？

Before signing this contract, the buyer and the seller may require the parties to produce proof of identity , the relevant documents business license , real estate license , etc., and carefully review the contents of the contract , carefully confirm that selectivity, complementary , modify content .

In entering into this Contract, the seller may ask the other person proof of identity, and Enterprise Legal Person Business License, real estate, and the required documents, and carefully review the contract, carefully confirm the selectivity, complementary, modification of content. The terms of the

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正在翻译，请等待...

正在翻译，请等待...