1.be absorbed in 全神贯注于…;聚精会神于…

  He was absorbed in the book.

  他全神贯注于书本上。

  She was completely absorbed in writing a letter when I entered.

  我进来时他正全神贯注于写一封信上。

2.be absorbed into 被并吞;被并入

  Small businesses are absorbed by big ones.

  小公司被大公司吞并了。

  Most little shops have been absorbed into big businesses.

  大多数小店已被并入大公司。