不断上涨的材料成本正在挤压我们的利润空间。

Rising material costs are squeezing our profit ___margin.

为了保持竞争力，这家零售商以极低的利润率运营。

To stay competitive, the retailer operates on razor-thin ___margins.

这款产品的初次上市利润微薄，令人失望。

The initial product launch had a disappointingly narrow profit ___margin.