However, people still know little about Neptune, until 1989 the Voyager 2 flyby of Neptune allow people to closely look at this blue planet.是什么意思_However, people still know little about Neptune, until 1989 the Voyager 2 flyby of Neptune allow people to closely look at this blue planet.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句