2. Stringed instruments produce a tone when a string is bowed, struck, or plucked. Where is the missing comma

Stringed instrument, any musical instrument that produces sound by the vibration ... The string may be struck, plucked, rubbed (bowed), or, occasionally, blown (by the ... No system of classification can adequately categorize the interactions. :]

imparadis't in one anothers arms  

the happier eden, shall enjoy their fill  

of bliss on bliss, while i to hell am thrust,  

where neither joy nor love, but fierce desire,  

among our other torments not the least,  

still unfulfill'd with pain of longing pines;  

yet let me not forget what i have gain'd  

from their own mouths; all is not theirs it seems:  

one fatal tree there stands of knowledge call'd,  

forbidden them to taste: knowledge forbidd'n?  

suspicious, reasonless. why should their lord  

envie them that? can it be sin to know,