double quotation marks什么意思？

double quotation marks的音标：...

Quotations within short quotations take double quotation marks.引用之中再引用使用双引号.If it contains other characters, it must be enclosed in double quotation marks.如果还包含其他的字符, 那麽这段字符必须用双引号引起来.If it contain other characters, it mu...