The company's sales growth has been rocket-powered since the launch of the new product.

rocket 是名词，意思是"火箭"，火箭以高速推进著称。 powered 是动词 power 的过去分词形式，power 意思是"提供动力"。 rocket-powered 字面意思是"由火箭提供动力的"，这里用作比喻，形容销售增长像火箭一样快速推进。