改进题：Assuming the laboratory tests go well, and you can quote us a competitive price,we would certainly be able to place more substantial orders on a regular basis.

译文：假定实验室检验顺利，并且你的报价有竞争力，我们会大量向贵公司订货的。

改进题：Assuming the laboratory tests go well, and you can quote us a competitive price,we would certainly be able to place more substantial orders on a regular basis.

译文：假定实验室检验顺利，并且你的报价有竞争力，我们会大量向贵公司订货的。

改进的译文：若实验室检验合格，且你们给我们的报价具有竞争力，我们一定会定期大量订货的。