Explorers in remote areas, ships at sea, even astronauts circling the earth axe able to keep in touch with civilization by means of radio.是什么意思_Explorers in remote areas, ships at sea, even astronauts circling the earth axe able to keep in touch with civilization by means of radio.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句