FACS分析显示，这21种表情涉及到的肌肉运动组合彼此不同，可以作为区分依据。

The FACS analysis revealed that the 21 expressions used a unique combination of muscles that was different from all other expressions.

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帕金森病和阿尔茨海默氏症涉及了脑细胞的丢失，这些脑细胞对不同的认知行为至关重要，包括运动，记忆和智力功能。

Parkinson's and Alzheimer's involve loss of brain cells crucial to a variety of tasks, including movement, memory and intellectual functioning.

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