Background field and Background value

∑ mode and △ mode

ENSO mode and ENSO-like mode

period ratio of torsion mode to translation mode

Academic background

accountant in the background of computer age

adapative background subtraction

adaptive background adjusting

adaptive background mixture models

Adaptive Background Model

Adaptive background modeling

Adaptive Background Subtraction

Adaptive Background Suppression

adaptive background update

Adaptive Background Update Rate

adaptive background updating

Agricultural geological background

Agriculture geologic background

Agrogelogical background

Agrogeologic background