0 the backward movement of waves, or the backward movement of water caused by something, such as a boat, passing through it -- 反流，尾流
1 an effect that is not the direct result of something -- （间接的）后果，余波
We certainly cannot go back to institutionalised incomes policies, the backwash of which is now presenting such huge problems for public finance.
To take on a service after the war, when there is a sort of bathos, a sort of backwash, is difficult.
Whereas before backwash the biofilm thickness on the media varied greatly along the height of the reactor, it became more uniform and much thinner after the backwash.
Rapid sand filters must be cleaned frequently, often several times a day, by backwashing, which involves reversing the direction of the water and adding compressed air.
The vortex is formed at the edge of the swash zone when backwash turns back into an oncoming wave bore.
The backwash process caused detachment of biofilm from the sulfur media and relocation of the media.
Slow sand filters and self-cleaning screen filters employ mechanisms other than backwashing to remove trapped particles.
Reversible fouling can be removed by a strong shear force or backwashing.
