1.a symbol in a mathematical or logical expression used to show a pattern, e.g. by representing a term in an equation or a statement in an argument
1.Make sure the cursor is at the place in the label publication where you want to add a placeholder.
确保光标位于标签出版物中要添加占位符的位置。
2.They give you fine-grained control over the layout of the final page by allowing you to control how the placeholder controls are rendered.
通过允许控制占位符控件的呈现方式，母版页使您可以在细节上控制最终页的布局。
3.It does not know what type T represents, but it can create a placeholder for that type to refer to the type that T must be.
它不知道T代表什么类型，但它可以为该类型创建一个占位符来指代T的类型。
4.The finish of formatting is indicated by a corresponding ending tag (x is a placeholder for the actual character shown in a tag).
由相应的结束标签来表示格式的完成（x是在标签中所显示的实际字符的占位符）。
5.If it is the last placeholder on a slide , this will insert a new slide with the same slide layout as the original slide .
如果这是幻灯片上的最后一个占位符，则将插入一个与原始幻灯片版式相同的新幻灯片。
6.There's one real difference, with a few different effects - container elements have been replaced by asp: PlaceHolder controls.
事实上这里只有一个真正的区别，这个区别会带来一些不同的影响：容器元素被asp：PlaceHolder控件代替了。
7.To add a page number to your own text, first position the insertion point in a text placeholder or text box where you want it to go.
要将页码只加到文本中，请先在文本占位符或文本框中定位插入点。
8.To add a slide number to this slide only, first position the insertion point in a text placeholder or text box where you want it to go.
要将幻灯片编码只加到此张幻灯片上，请先在文本占位符或文本框中定位插入点。
9.To add the date or time to your own text, first position the insertion point in a text placeholder or text box where you want it to go.
要将日期或时间加到文本中，请先在文本占位符或文本框中定位插入点。
10.Is a placeholder for the name of the ActiveX control that you try to load.
是占位符代表的ActiveX控件，您尝试加载名称。