The vibrating air molecules are the sound wave that you hear (the frequency or pitch of the sound wave is the same as the resonant frequency of the glass).
(The vibrating air molecules; are; the sound wave that you hear (the frequency or pitch of the sound wave is the same as the resonant frequency of the glass)) (the sound wave; hear; you) (the frequency or pitch of the sound wave; is; the same as the resonant frequency of the glass)
The vibrating air molecules the sound wave the frequency or pitch of the sound wave
are hear is
the sound wave that you hear (the frequency or pitch of the sound wave is the same as the resonant frequency of the glass)
you
the same as the resonant frequency of the glass