nothing, zilch, fizzle, damp squib
hiss, hissing sound, psst
sound dropout, audio glitch
siftings, screenings, chaff, sifting residue
sifting out, screening out, sieving
dropout, attrition, weeding out
Отсев студентов на первом курсе был большим.
There was a high dropout rate among the students in their first year.
