名詞 overdrive:

1. the state of high or excessive activity or productivity or concentration
2. a high gear used at high speeds to maintain the driving speed with less output power

動詞 overdrive:

1. drive or work too hard
2. make use of too often or too extensively
   同義詞：overuse

o.ver.drive

n.（名詞）
A gearing mechanism of a motor vehicle engine that reduces the power output required to maintain driving speed in a specific range by lowering the gear ratio.
（汽車的）超速檔：機動車輛的一種齒輪裝置，通過降低齒輪比率來減少為將車速保持在一定范圍內(nèi)而需要的輸出力
Informal A state of heightened activity or concentration:
【非正式用語】 高度活躍或注意力高度集中的狀態(tài)：
例句：
shifted into overdrive toward the end of the semester.
把注意力都轉(zhuǎn)移并集中到期末的學(xué)習(xí)中來

v.tr.（及物動詞）
o.ver.drove[-drôv.] o.ver.driv.en[-drv.…n] o.ver.driv.ing,o.ver.drives[ô.v…r-drov.]
To drive (a vehicle) too far or too long.
驅(qū)使過度：驅(qū)使車輛過遠或過久
To push (oneself) too far, as in the performance of tasks.
使（人）操勞過度：如在執(zhí)行任務(wù)時，使（自己）過于疲勞