preoccupied
adj. 全神贯注的，心事重重的；被先占的
v. 使全神贯注，占据（某人的思想）；提前占据（preoccupy 的过去式和过去分词形式）
例句
His mannerisms are more those of a preoccupied maths professor.
他的言谈举止更像是一个全神贯注的数学教授。
《柯林斯英汉双解大词典》
He was preoccupied and had not even listened to Heidi's tales.
他全神贯注，甚至没有听海蒂的故事。
He was too preoccupied with his own thoughts to notice anything wrong.
他只顾想着心事，没注意到有什么不对。
《牛津词典》
