Dr Smith trained her fish to ring a bell when they wanted food怎么翻译?

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• 英语翻译要完全人工的翻译!The Angel FishHow can you tell when a fish wants to wat?Does a hungry fish look the same as a full one?Jane trained her angel fish to ring a bell when they wanted food.for a few days she didn't feed them at all.they were very hungry.then she tied a little bell to one end of a string.she tied food to the other end and put it in the water.when the fish ate,the bell rang.This were on for a few days.the fish ate the food,and the bell rang.the
• Dr Smith trained her fish to ring a bell when they wanted food怎么翻译?
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