dairy product例句

They Saturday usually in dairy product shop. To write how with English?
星期六英语怎样写|她们星期六通常在乳品店.用英文怎样写?

The support dairy product enterprise strengthens the quality detection.
扶持乳品企业加强质量检测.

Butter is a dairy product.
牛油是一种乳脂产品.