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.
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。
Creates a gray rectangle for the system caret and claims ownership of the caret. The caret shape can be a line or a block.
这个函数为系统插字符创建一个灰色的矩形，并声明对插字符的所有权。插字符的形状可以是线条，也可以是方块。
A line-box is an imaginary rectangle that contains all the inline boxes that make up a line in the containing block-level element.
line - box是一个假想的矩形框，包含在此块级包含元素内连成一线的所有inline box。
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