However, people still know little about Neptune, until 1989 the Voyager 2 flyby of Neptune allow people to closely look at this blue planet.
英
美
- 但人们对海王星的认知不多,直至1989年航行者2号探测船飞掠海王星时才让人类第一次近距离观看这颗海蓝色的天体。