n.<法>(职业的)女吹哨手
Sift the flour into a bowl.
把面粉筛到碗里。
Sift out the wheat from the chaff.
把小麦的壳筛出来.
Sift the flour and baking powder into a medium-sized mixing bowl.
将面粉和发酵粉筛入中等大小的搅拌碗中。