帮忙翻译一句话，谢谢啦~~

With the tariff of import-mobile phones reduce to zero,prices of the indigenous mobile phones have fallen down,and so were the profits

As the tariff of imported mobile phones decrese to zero,the prices of mobile phones made by China go down and the profit margin of this industry reduces as well.
原句是个病句，要么把随着去掉，要么把使去掉，要不没法翻译