1·Hold the floss tightly between your thumbs and forefingers, with about an inch (2.5 cm) of floss between them.
两只手的食指和大拇指分别捏紧牙线的一端， 中间留出一英寸长（2.5厘米） 。
2·Are Asians more likely to floss their teeth?
亚洲人用牙线清洁牙齿的比例更高吗？
3·Wind the dangling floss around the middle finger of the other hand.
将悬挂着的牙线缠绕在另一只手的中指上。
4·You know you should floss, but should is not enough.
你明白应当用牙线清洁牙齿，但“应当”是远远不够的。
5·Brush your teeth at least twice a day, floss at least once a day, see your dentist regularly, and avoid smoking or chewing tobacco.
至少两天要刷一次牙，每天用一次牙线，定期拜访牙医，并且避免抽烟和咀嚼烟草。
1·Brush twice a day, and floss once a day.
一天刷牙两次，用牙线洁牙一次。