然后在图像的中心绘制图形的主标题和子标题。
The main title and subtitle for the graph are then drawn in the center of the image.
该用户为主标题选择了粗体，为子标题选择了粗体加斜体。
This user has chosen bold formatting for a main heading and bold plus italics for a sub-heading.
比如，表单应该有一个清晰简单的标题和一些相关的子标题。
For example, forms should display a clear and simple header along with related sub-headers.
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