over·drive /ˈovɚ/
  (vt.)驅使過度,虐待過速裝置
  O·ver·drive v. t. & i. To drive too hard, or far, or beyond strength.
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  overdrive
       n 1: the state of high or excessive activity or productivity or
            concentration; "Troops are ready to go into overdrive as
            soon as the signal is given"; "Melissa's brain was in
            overdrive"
       2: a high gear used at high speeds to maintain the driving
          speed with less output power
       v 1: drive or work too hard; "The teacher is overworking his
            students"; "Overdriving people often suffer stress"
       2: make use of too often or too extensively [syn: overuse]
       [also: overdrove, overdriven]