Definition
To be completely engrossed in reading a book; to be deeply absorbed in reading.
埋頭讀書
He always has his head buried in a book, barely noticing I came in.
他總是埋首於書本之中，幾乎沒注意到我進來了。
Before the exam, she had her head stuck in a book all day long.
考試前，她一整天都埋首於書本之中。
When I saw him, he had his head buried in a book, completely oblivious to everything around him.
當我看到他時，他正埋首於書本之中，完全沒注意到周圍的一切。