The rats had been conditioned to ring a bell when they wanted food.
这些老鼠已经过训练,想吃食物时就会按铃。
I don't know the person you mention, though the name seems to ring a bell.
你提到这个人我并不认识,但名字听起来似乎耳熟。
This often proves difficult and can take a long time so I will ring a bell so that everyone knows it's time to eat! Hopefully this will speed things up a bit.
事实证明这很困难并可能需要很长时间,所以我会提醒每个人,是时候吃东西了!希望能加快速度。
And of course it exists in a semiotic relationship to a white light over a street door which means "this is my house; if you wish you can ring the bell but I'd just as soon you stayed out."
当然它是存在于一个语义篇中的,而临街门上的白灯则意味着,这是我的房子,你要进来必须按门铃,但是你最好别进来“
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