To measure this, passengers were given glasses of water with seven different concentrations of colorless artificial flavorings, and asked to note at which level they registered a sensation.
为了对此进行测量，他们给了乘客7杯水，水中分别掺杂了7种不同浓度的无色人工香料，要求乘客们指出他们在哪种浓度水平上尝出了味道。
It could be applied to Music Course. We could make glasses of difference volume of water to form seven notations if there is no specific percussion instrument.
音乐也可以如法炮制，如果没有专门的击打乐器，用杯子盛不一样量的水也能调试出一组音高来。
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