它那双充满好奇心的大眼睛与缺乏表情的面庞似是被机械化，如同大量生产的漫画和杂志。

The wide-eyed look of fascination and lack of expression is mechanical, as if mass manufactured like anime books and magazines.

youdao

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.

youdao

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.

youdao