英语语法分析

The authorities know that a large number of realtors ignore the rule and presell under the table.

专家了解到有很大一部分的房地厂商无视规定私下预售。

The objection of this transaction and the content of the contract is special. To presell the apartment, the seller must obtain some basic conditions.

商品房预售是一种附期限的法律行为，交易的标的和预售合同的内容都具有特殊性，进行预售需要具备一些基本条件。