搞清楚刑事照片的证据类别，并且按照不同证据类别的具体要求进行刑事照相工作，具有现实意义。
It has practical significance to carry out the job of penal photograph in the specific demand of different evidence category.
同样，有证据表明，在调查中，家庭以外的食物消费是记录最不完善的类别之一。
Again, there is evidence that food consumed out of the home is one of the most poorly recorded categories in surveys.
首先，划分出的每种类别背后都有强大的科学证据支撑。
First, each of the categories has strong scientific evidence behind it.
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