See section 11.15.2 for translations in the plane.
The translation command takes one or two arguments. The first argument is the translation vector given by a list of coordinates, the optional second argument is a geometric object.
With one argument, translation returns a command which
translates objects along the given vector.
returns and draws the point at (1,2,3)+(1,1,1) = (2,3,4).
With two arguments, a vector and an object, transformation
returns and draws the translated object.
returns and draws the line through (0,0,0)+(1,1,1)=(1,1,1) and (1,2,3)+(1,1,1)=(2,3,4).