Měng / yī / kàn / tā / hǎo / xiàng / bù / tài / gāo / xìng / qí / shí / zhǐ / shì / yǒu / diǎn / lèi

猛一看他好像不太高兴，其实只是有点累。

At first glance, he seems unhappy, but he is actually just a little tired.