A person who is ignorant, slow-witted, or unable to understand reason; someone who is unenlightened or stubbornly obtuse.
他有时就像个黑漆皮灯，无论别人怎么耐心解释，他就是听不进去道理。
He sometimes acts like a black lacquered leather lamp; no matter how patiently others explain, he just won't listen to reason.
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