... 织补针／TheDarning-Needle 钟声／TheBell 祖母／Grandmother ...
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In that experiment, Ledoux conditioned rats to fear a bell by ringing it in time with anelectric shock until the rats froze in fear at the mere sound of thebell.
试验中，勒杜按时闹铃并且电击老鼠直到它们一听到铃声就吓得僵住。
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