可是，理解面部表情之类的事物对他们来说却很困难。
However, they can find it difficult to interpret things like facial expressions.
孤独症人士一般都有交流上的困难，因为我们不能直觉地解读非语言信息- - -比如面部表情和肢体语言。
Autistic people often have difficulties in communication because we are unable to intuitively read nonverbal cues, such as facial expressions and body language.
面部表情捕捉比动作捕捉更加困难，因为面部的动作要小得多。
Capturing facial expressions is harder than motion capture because the movements are much smaller.
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