по прямой

см. тж. двигаться по прямой; перегибаться по прямой

The particle moves as a crow flies (разг.).

The chain pitch is measured on a straight line between the centres of adjacent pins.

The satellite model was moving in a straight line over a stationary Earth.

The particle moves in (or along) a straight line.

Источник: Русско-английский научно-технический словарь на Gufo.me