题目选项分析

Unlike the other major planets, Pluto has a highly eccentric orbit and is thus closer to the Sun than Neptune is for 20 years out of every 230-year cycle, even though it is commonly described as the remotest planet in the solar system.

Unlike the other major planets, Pluto's orbit is highly eccentric and is thus closer to the Sun than Neptune for 20 years out of every 230-year cycle, even though it is commonly described as the remotest planet in the solar system.