n.丝棉;乱丝;绣花丝线;绒毛;
vi.用牙线清洁牙齿;
例句:
How to Brush! How to Floss!
如何刷牙! 如何拉牙线!
Right now there should be about six inches ( 16 cm ) of floss dangling from one finger.
留出一段约6英寸 ( 16厘米 ) 的牙线悬挂在手指上.
Wrap most of the floss around the middle finger of one hand.
将牙线的大部分卷在一只手的中指上.