校长威严的脸上表情僵硬，面对这对夫妇时趾高气扬。
The president, stern-faced with dignity, strutted toward the couple.
大脑中多巴胺产生的减少能导致震颤、平衡的问题、面部表情僵硬和说话含糊不清等症状。
The loss of dopamine production in the brain can lead to tremors, balance problems, stiff facial expressions and muffled speech, among other things.
他们难得一笑，但当他们真的笑起来时，那张脸同我们司空见惯、习以为常的那张面具般表情僵硬的脸天差地别，扭曲得让你无从辨认。
But it is true that they so seldom smile that when they do we do not recognize their face, so distorted it is from the fixed mask we take for granted.
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