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Which of the following is the noun of maintain ?
Which of the following is the noun of "maintain?"
The Hubble Space Telescope has shut down and gone into safe mode after one of its gyroscopes used to point and stabilize the observatory failed. Out of six gyroscopes, only two are currently operating. Hubble requires three of its gyroscopes to maintain optimal efficiency. Inference: The Hubble Space Telescope requires all of its six gyroscopes to maintain optimal efficiency.