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（单词翻译）
Lonely planets
Vocabulary
gas giants
large planets which don't have a solid surface
rogue
unconventional, not normal
came into being
were formed, created
cast-outs
objects that have been thrown away
ejected from
thrown out of
gravitational forces
the natural attraction that pulls objects in space together
interplanetary collisions
crashes between planets
Strictly speaking
Being accurate
the remains of
what is left of
orbs
round, ball-shaped objects
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