当脑扫描仪变得更便宜更普及，它能由研究工具变成任何人都可以用于发现他们被爱到何种程度的手段吗？
And as brain scanners become cheaper and more widely available, they might go from being research tools to something that anyone could use to find out how well they were loved.
在他们的研究中使用了光谱分析。 光谱分析原理是将天体光源通过光谱仪，通过光谱被减弱的程度，得出样品中元素含量。
They used spectroscopy for their analysis: a technique that breaks the light from celestial objects into a spectrum with telltale emission lines indicating which elements are present.
为了探明这一问题，这两位研究者给208位大学生做了一连串的电车测试并以四探针测试仪那样的精细程度检测他们反应的实用主义程度几何。
To find out, the two researchers gave 208 undergraduates a battery of trolleyological tests and measured, on a four-point scale, how utilitarian their responses were.
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