MKII(MK二号),a planet(一颗行星) billions of kilometres away(亿万公里远)
MK二号,一颗亿万公里之外的行星
a planet billions of kilometres away是同位语=MK II
a planet名词
billions of kilometres away定语,修饰a planet
MKII(MK二号),a planet(一颗行星) billions of kilometres away(亿万公里远)
MK二号,一颗亿万公里之外的行星
a planet billions of kilometres away是同位语=MK II
a planet名词
billions of kilometres away定语,修饰a planet