The hills in this area are perfect for wine-growing due to their sunny slopes.

wine-growing 是由 wine（葡萄酒）和 growing（种植）组成的复合词，中间用连字符连接。wine 指"葡萄酒"，growing 是动词 grow 的现在分词形式，表示"种植、生长"。 wine-growing 合起来指"种植用于酿酒的葡萄"，即"酿酒葡萄种植"。