A skier speeds through the snow.
A skier moves through some snow.
Moves is a rephrasing of speeds.
exists e1 x1 x2.(n_snow(x2) & through(e1,x2) & Actor(e1,x1) & v_speed(e1) & n_skier(x1))
exists e1 x1 x2.(through(e1,x2) & n_snow(x2) & Actor(e1,x1) & v_move(e1) & n_skier(x1))