Without it, galaxies and clusters of galaxies should fly apart.
如果没有,星系及星系群应该会分崩离析。
Things fly apart, "as the poet says, and it's not a unity after all."
东西就会解体“,这根本就不是一个整体。”
If they are cracked or damaged they could fly apart in operation and must not be used.
如果有裂纹或已损坏,则其在运转过程中可能会飞溅出碎片,因此不可使用。
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