3.Your technique needs a major makeover.
3.你的刷牙方法需要有大改变。

Hold the brush so the bristles are at a 45-degree angle to the surface of the teeth and brush in small circles. Focus on a few teeth at once, then move on to the next set, continuing around from one side to the other, top and bottom, front and back. It's okay to brush in straight lines on the chewing surfaces. After completing your circles, brush away from the gum line to clear off loosened plaque and bacteria.
手握着牙刷，让其同牙齿表面成45°角，以打小圈的方式刷。起先小范围的刷，然后移动到下一个区域，继续从一边移到另一边刷，上下，前后。在牙齿的咀嚼面成直线刷也是可以的。在完成循环刷以后，刷掉分布在牙龈线上的牙龈斑和细菌。

4.You're brushing too hard.
4.你刷牙太用力了。

The chances of enamel breakage are greater when you brush too hard.
刷牙力气过大更容易损伤你的牙釉质。

5.You're using the wrong brush.
5.你用错了牙刷。

Be sure to buy soft or ultrasoft brushes to minimize damage. Electric toothbrushes are great tools if they help you brush longer and get you to the right places.
确保你使用的是柔软的或超软的牙刷，这样能使损伤降到最低。如果电动牙刷能帮助你刷的更久，并且刷对了位置，那么它就是最好的。

6.You have the wrong toothpaste.
6.你用错了牙膏。

Baking soda toothpastes are good at getting stains out because they are abrasive -- but that also means they're hard on enamel.
小苏打牙膏能很容易把污渍刷出来是因为它们有研磨作用—但是这也意味着它们比较坚硬会伤害牙釉质。