英语 ⇄ 俄语 +

drop through the floor 强调
Игорь Миг	стремительно падать; проседать; рухнуть
一般	резко снижаться (e.g. "The cost of whole genome sequencing – mapping the DNA code of any human being – is dropping through the floor, from £750m for the first-ever sequence to probably as little as £1,000 soon." guardian.co.uk Aiduza)