注意，如此时未指定文档长度，则打印预览时不会产生纵向滚动条。

Note that if the document length is not specified by this time, a scroll bar is not displayed during print preview.

youdao

需要不断的横向或者纵向拖动滚动条，使得这些方法效率很低并且难以使用。

The need to constantly scroll horizontally and vertically makes these methods inefficient and difficult to use.

youdao