头脑

tóu nǎo chí dùn

头脑迟钝

be slow-minded

tóu nǎo cōng ming

头脑聪明

have a brilliant mind

tóu nǎo kōng kōng

头脑空空

have an empty skull

tóu nǎo fā rè

头脑发热

become hot-headed

mō bù zháo tóu nǎo

摸不着头脑

cannot make head or tail of something