International private leased circuits are offered to several mainland gateway cities, while some operators provide roaming services to mobile phone and pager users when they are on the mainland.是什么意思_International private leased circuits are offered to several mainland gateway cities, while some operators provide roaming services to mobile phone and pager users when they are on the mainland.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句