Pass through a sieve is a process that involves separating out the larger particles from the smaller ones. Sifting, or passing through a sieve, is a common technique used in cooking and baking to separate out the larger pieces of flour, sugar, or other ingredients from the smaller ones. It is also used in gardening to separate out the larger pieces of soil from the smaller ones. In both cases, the sieve is a mesh-like device with small holes that allow the smaller particles to pass through while keeping the larger particles behind.