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To move quickly back and forth.
Vibrations
A back and forth is an act of moving someone or something forward and returning it to the same position. The term can be used literally, as in a physical object or figuratively, such as an emotional state.
Pace.
If something oscillates it is moving back and forth between to position or states.
Moving back and forth in time is called time travel.
To move quickly back and forth.
A trombone is an instrument that is played moving a slide back and forth.
Moving back and forth like a washing machine
It would probably depend on how fast you were moving your head and how you were walking. I would think walking in a tight circle and moving your head back and forth quickly, would make a person dizzy, at least.
vibration
Heat is when atoms are bumping into each other or moving back and forth. The motion of the atoms form an energy and this is called heat.
It walks by moving its but back and forth
only some by moving there flagellum back and forth
yes
She rocks her whole body
then the egg will most likely being moving back and forth as well, especially if the chick is almost ready to be hatched