... letter-spacing 文字间间距 line-height 行高度 text-decoration 文字修饰 underline 下划线|| line-through 横线|| blink 闪烁 ...
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对于行高度来说，仍是内容优先。
yesno选项需要至少三个参数：问题文本以及对话框本身的高度和宽度，后者用行和列度量。
The — yesno option requires at least three arguments: text for the question and the height and width of the dialog box itself, measured in rows and columns.
然而，如果每个不同的索引值都有许多重复的行，而所关联的表是高度群集的，那么通过索引添加的连接成本可能很低。
However, if there are many duplicate rows per distinct index value, and the associated table is highly clustered, the added costs of joining through the index can be slight.
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