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。
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.
液晶显示自己不发射光，相反，是由晶体分子组成，电场使得这些分子排成一行，在某种程度上改变着它们的光学特性。
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.
液晶显示自己不发射光，相反，是由晶体分子组成，电场使得这些分子排成一行，在某种程度上改变着它们的光学特性。
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