Preguntas sobre ejemplos de oraciones con, y la definición y uso de "Doppler"

A: It's correct, 'off' is a different from 'of'. 'Off' is similar to 'from' in certain situations. So, sounds reflects off a moving object- sound hits the moving object and reflects back from it. You can't really say 'reflects from', it 'reflects off'. Another examples: taking a book off the table; bouncing a ball off the wall. Sometimes, both 'of'and 'off' can be used in the same sentence: get off of me- if people are fighting, for example, and one pins the other to the ground.