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(单词翻译:双击或拖选)
Earth-orbit ‘sweeper’ proposed
Vocabulary
messy
untidy
space junk
fragments of space travel leftovers that encircle the Earth
a hand's breadth
the width from thumb to little finger of a hand spread open
manned space missions
spaceships with astronauts on board
threats
items that could cause a collision
skip
move between the objects
harmlessly
not causing any damage
orbital housekeeper
device that circles the Earth and 'cleans' the area
straightforward solution
uncomplicated answer to the problem
unusable
unfit to use