簸动

bǒ dòng liáng shi

簸动粮食

blow away particles of chaff

yá shuā yǐ yuán zhōu huò zhě shàng xià bǒ dòng de fāng shì lái shuā zhè kuài qū yù

牙刷以圆周或者上下簸动的方式来刷这块区域。

Using either a circular or jiggling, up-and-down motion, brush this area with your toothbrush.