double quote ldquo; ”double quotation marks“ ”double quotation marks双: two; twin; both; dual引号: quotation marks引号: quotation marks 单引号 single quotation marks (‘ ’); 双引号 double quotation marks (“ ”)双引擎: twin engines双引线: double lead; doublelead; twin-lead下载手机词典可随时随地查词查翻译