Continental standard: use double quotation marks first, single quotation marks when internal reference is needed, double quotation marks when reference is needed, and so on. Keep double quotation marks in the vertical column and replace them with ""and "". (According to People's Republic of China (PRC) national standard "Usage of Punctuation Symbols", 1995 12 13, implemented on 1996 1. Local standard of Taiwan Province Province: If internal quotation is needed, use single quotation mark ""before double quotation mark "". And it needs double quotation marks, so use single quotation marks, and so on. (According to "Mandarin Promotion Committee of the Ministry of Education of the Republic of China" and "Punctuation Proofreading Manual", Taiwan Province Academic Network, 3rd edition,1March, 986. ) directly quote others' words, with quotation marks; Quote others indirectly, without quotation marks. When quoting several paragraphs in succession, use the front quotation mark at the beginning of each paragraph and only the back quotation mark at the last paragraph.
Quotation marks indicate the parts quoted in the text. There are two kinds of double quotation marks and single quotation marks, which are marked as ""and ""respectively. Where ""and ""are square quotation marks, which are used when western quotation marks are inconvenient to use. The earliest hook brackets came from Japan (Japanese hook brackets are not all quotation marks in Japanese). Hong Kong, Macao and Taiwan are used to using ""and ""in horizontal arrangement.
1. stands for a reference.
2. Represents a specific title.
3. Express special meaning.
4. Express sarcasm and ridicule.
5. Highlight.