咖啡师在水罐中发泡牛奶的特写 Close-up of Barista Frothing Milk in a Pitcher

特写：一名咖啡师在咖啡机蒸汽棒的帮助下，在不锈钢壶中发泡牛奶。

Close-up of a barista foaming milk in a stainless jug with the help of the coffee machine's steam wand.