And you can use letter collections (as you might in a regular expression), for example, to list the files with a "c" or "o" extension, as shown in Listing 2.
A letter in the Science Museum's files noted that W.
科学博物馆档案中的一封书信显示，布拉默w。
3
Notice that the generate-pdf-file mode USES the page-size parameter to set the page size correctly (we generate both a letter-sized and A4-sized PDF files).
注意：generate - pd f - file方式使用page - size参数来正确设置页面大小(同时生成letter和a 4两种大小的pd f文件)。