You can only animate text that is contained in a drawing object, such as rectangles, lines, or text objects. For example, draw a rectangle, then double-click the rectangle and enter your text.
只能对包含在绘图对象（如矩形、线条或文字对象）中的文字应用动画效果。例如，绘制一个矩形，然后双击该矩形并输入文字。