设置line-height（行高）等于height（高度）使文本垂直居中。

Text is vertically centered by having height.

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您在配料清单中看到的row类将设置42像素高的块，该块适用于圆角矩形内的一叠行中的一行。

The row class, seen in the ingredient listing, sets a 42-pixel high block, suitable for a single line in a stack of lines inside a rounded rectangle.

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这包括把类似p, header, li等块元素统一(或者部分分类)设置成站点的统一行高。

This includes things like setting the margins on block level elements like paragraphs, headers, and lists to the same value as (or some multiple of) the base line-height setting for the site.

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