由于无法理解社会信号比如面部表情和语音语调，所以患儿不会明白别人的想法和感觉，也就导致他们缺乏同情心。

Because they don't understand social cues like facial expressions or tone of voice, children with ASDs have trouble interpreting what others are thinking or feeling. They may lack empathy as well.

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团队发现，缺乏睡眠让人像僵尸一样用某种固定表情环顾四周。

Sleep deprivation made people look about as expressive, the team found, as a zombie.

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但是，最主要的特征是缺乏面部表情。

But the main feature is an absence of facial expression.

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