1. 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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2. An LCD does not emit light of its own. Rather, it consists of crystal molecules. Anelectric field causes the molecules to line up in a way that alters their optical properties.
3. An LCD does not emit light of its own. Rather, it consists of crystal molecules. Anelectric field causes the molecules to line up in a way that alters their optical properties.
