关于基础开挖与回填（3.1.2.b和3.1.2.c）的解释：由于招标文件的中文翻译,我公司在理解上出现偏差，曾咨询过业主。因此，我公司的投标报价仅计算了砼的单价，未计算基坑土方挖、运填工程内容，故砼的单价未包括基坑土方挖、运、填价格。

Clarification of excavation and backfill of foundation pit (3.1.2.b & 3.1.2.c): Referring to the Chinese translation of the RFP, our company misunderstood the confines of such terms and then we consulted to the owner. Therefore, the quote in our former bidding documents only calculated the unit price of concrete, while not considering the excavation, transportation and backfill of the earthwork of the foundation pits, which means the above quote of unit price of concrete did not include the price for excavation, transportation and backfill of the earthwork of the foundation pits.