1. To get a literal '%', insert "%%". ���Ҫ�õ�һ��'%'�����롰%%����
2. All characters are ordinary, the expression is a literal string. �����ַ�������ͨ�ģ�����ʽ�������ַ�����
3. A backslash followed by the $ character results in a $ character in the text literal, without doing any variable substitution. һ����б�ܺ����һ��$�ַ������һ���ı�����ֵ��$�ַ��������κα����滻��
ӢӢ����
n.
1. a mistake in printed matter resulting from mechanical failures of some kind
2. being or reflecting the essential or genuine character of something
3. without interpretation or embellishment
4. limited to the explicit meaning of a word or text
5. avoiding embellishment or exaggeration (used for emphasis)
�ɿ�Ӣ�� - 划词释义
