The building blocks of FACS are 46 action units  (AUs) such as a wrinkling of the nose, a puffing of the cheeks, dilation of the nostrils, squinting, and so on.
There are forty-six action units, like squinting and wrinkling the nose, that comprise the basic elements of FACS.
The action units of FACS involve only body movements, not facial expressions like squinting.
He described his past.
The hotel was located far from Frank's office.
The board thought that the money was to help people with everyday needs.
People are wearing bathing suits.
Their course was a straight line.
A welder working hard.