To be absorbed in self-admiration; to be excessively pleased with oneself, often oblivious to reality or others' opinions.
他总是沉浸在自己的小世界里，对别人的建议充耳不闻，真是有些自我陶醉。
He is always immersed in his own little world, turning a deaf ear to others' advice, truly a bit self-absorbed.
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