题目

LONDON—The tiny, distant and frozen planet Pluto, for 30 years believed to have just one moon, has suddenly been found to have two more satellites.             Only discovered in 1930 because of its vast distance from Earth, Pluto has remained a largely mysterious object ever since.             Some three billion miles from the Sun, Pluto, a dwarf planet, remains to be visited by a spacecraft.             Its first known satellite is called Charon. With a diameter of 1,200 km, it is half that of Pluto—unusually large for a moon in relation to its primary. �似乎没有人知道公园里发生了什么事。 (seem)