sieving

动词 sieve:

1. examine in order to test suitability
   同义词：screen, screen out, sieve, sort
2. check and sort carefully
   同义词：sieve, sift
3. separate by passing through a sieve or other straining device to separate out coarser elements
   同义词：sift, sieve, strain
4. distinguish and separate out
   同义词：sieve, sift

1. She is sieving the rice in order to sieve out the stones.
   她正在把米过筛，好把石头筛出。