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1·As soon as the bristles on your toothbrush begin to wear, throw it out.

牙刷毛一旦磨损就扔掉。《柯林斯英汉双解大词典》

2·The toothbrush gently removes plaque without damaging the gums or causing bleeding.

牙刷轻轻地刷去齿菌斑，没有伤及牙床或引起出血。《柯林斯英汉双解大词典》

3·How do you choose your toothbrush?

你是如何选择你的牙刷的？

4·When you travel, don't forget to pack your toothbrush.

当你要去旅游时，别忘了带你的牙刷。

5·Do not bring flowers on your first date; bring your toothbrush and your cat.

第一次约会的时候不要带鲜花；带上你的牙刷和你的猫。

6·In most families, toothbrush, gargle, towels, etc and closestool coexist one room.

大部分家庭中，牙刷、漱口杯、毛巾等与马桶共处一室。

7·All of these strategies will get you a toothbrush, but none gets you the best one for the job.

所有的这些策略都能让你得到一把牙刷，但没有一个能让你得到最适合这份工作的牙刷。

8·While you're at it, you could cut your grass with a pair of scissors and wash your car with an old toothbrush.

当您做到这一点后，您可以用剪刀剪草，用旧牙刷洗车。

9·A man has five items in his bathroom: a toothbrush, shaving cream, razor, a bar of soap, and a towel from the Holiday Inn.

男人的浴室里有五样东西：一把牙刷、剃须膏、剃须刀、一块肥皂和一条从假日酒店顺来的毛巾。

10·523 students cleaned their teeth within ten minutes of eating. When possible, they used a toothbrush; when this was impossible, they washed their mouth thoroughly with water.

523名学生在吃饭后十分钟内刷牙。如果情况允许的话，他们会使用牙刷；否则，他们会用水彻底清洗口腔。

牙刷

1·When you travel, don't forget to pack your toothbrush.

当你要去旅游时，别忘了带你的牙刷。

2·In most families, toothbrush, gargle, towels, etc and closestool coexist one room.

大部分家庭中，牙刷、漱口杯、毛巾等与马桶共处一室。

3·523 students cleaned their teeth within ten minutes of eating. When possible, they used a toothbrush; when this was impossible, they washed their mouth thoroughly with water.

523名学生在吃饭后十分钟内刷牙。如果情况允许的话，他们会使用牙刷；否则，他们会用水彻底清洗口腔。

4·Seeing as you put a toothbrush in your mouth two or more times per day, it's worth going with a reputable manufacturer.

想象下你将用一把牙刷每天两次甚至更多地放入你的嘴巴，我想选择一个有声望的生产商会好些。

5·He has developed several prototypes of hand-cleaning devices that can be mounted on walls, as well as a portable, battery-operated model the size of a large electric toothbrush.

他发明了好几种洁手装置的原型机，这些机器可以悬挂在墙上，跟那种便携式的电动模型一样，大小相当于一支较大的电动牙刷。

(1)electric toothbrush电动牙刷