基线对齐：印刷字体学的术语。指每个字母都沿着它的基线对齐位置。

Alignment: Typographic term to indicate the position of each type is perfectly aligned across a base line. The term in full is base alignment.

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将行内框的基线对齐父框的基线。

Align the baseline of the box with the baseline of the parent box.

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如果该行内框没有基线，将框的底线对齐父框的基线。

If the box does not have a baseline, align the bottom margin edge with the parent's baseline.

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