产品product可数吗

　　It was a time of peak demand for the product.

　　那是对该产品需求最旺的时期。

　　The product is at the design stage.

　　产品处于设计阶段。

　　The product was developed in response to customer demand.

　　这种产品是为了满足顾客的需要而开发的。

　　Each product has a number for easy identification.

　　每件产品都有号码以便于识别。

　　The product has filled a gap in the market.

　　这个产品填补了市场的空白。