translation.ar: والتي لاتتحرك ولانها لا تتحرك اثناء ذلك اقصد .. اثناء التجربة فلا داعي للاهتمام بكيفية حركتها
translation.en: They don't move, and because they don't move during the course of the experiment, you don't have to worry about how they're moving.