1. 检索
The retrieval of information from a computer is the process of getting it back.

2. 取回;找回
The retrieval of something is the process of getting it back from a particular place, especially from a place where it should not be.

1. the act of regaining or saving something lost (or in danger of becoming lost)

Synonym: recovery

2. the cognitive operation of accessing information in memory

e.g. my retrieval of people's names is very poor

3. (computer science) the operation of accessing information from the computer's memory