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那人是一个兜卖整套牙齿、牙膏、牙粉和药酒的走江湖的牙科医生。A substance, such as a paste or powder, for cleaning the teeth.

为了产生较佳的泡沫效果，18世纪末牙粉中又添加了硼砂粉。Borax powder was added at the end of the 18th Century to produce a favourable foaming effect.

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这些牙膏或牙粉含有粗槽的磨牙剂，使用龈线上的牙齿的磨损增加。Sometimes they contain rough abrasives that cause increased abrasion of the teeth at the gum line.

19世纪初牙粉中添加了甘油，使粉末成为膏状，更容易被接受。Glycerine was added early in the 19th Century to make the powders into a paste and more palatable3.

此外还有些木梳、发膏、漱口杯、牙粉瓶、肥皂缸一类的东西。In addition still some woods comb, hair cream, tooth mug, tooth powder bottle and soap the urn is a type of thing.

如果使用盐、粗牙粉等刷牙，会导致牙齿外壁划痕。Coal powder, salt, rough tooth powder, etc when used for brushing lead to scratches in the outer layer of the teeth.

那人是一个兜卖整套牙齿、牙膏、牙粉和药酒的走江湖的牙科医生。He was a quack dentist on his rounds, who was offering to the public full sets of teeth, opiates, powders and elixirs.

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有钱人用毛刷蘸牙粉刷牙，穷人则用手指蘸小苏打清洁牙齿。The rich applied toothpowder with a brush. The poor cleaned their teeth with bicarbonate of soda, using their fingers.

记录中说明了混合成分的数量，但没有说明如何使用这种牙粉。Directions are given about relative quantities that should be mixed, but no instructions are available about how this powder was used.

1918年陈蝶仙成立家庭工业社，研制出一种名叫无敌牌的牙粉，从此走上实业家的道路。He invented the dentifrice called WuDi and founded the Family Industry Manufactory in 1918 . Since then he chooses his way as a industrialist.

直到十八世纪，英国出现了牙粉，这是牙膏史上的另一个巨大的飞跃。There is then another huge gap in the history of toothpaste until the 18th Century, when toothpowder, or dentifrice, became available in Britain.

两个伙计和学徒就乱哄哄地拿过脸盆，毛巾，牙刷，牙粉来装配成一组。The salesmen and the apprentices noisily collected the wash-basins wash-cloths tooth brushes and boxes of tooth powder and arranged them into sets.

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早在公元前5000年，埃及人就在制作牙粉，其成分包含牛蹄粉灰、没药、粉状和烧焦了的蛋壳以及浮石。As long ago as 5000 BC the Egyptians were making a tooth powder consisting of powdered ashes of ox hooves, myrrh, powdered and burnt eggshells, and pumice.

大多数的牙粉将小苏打用作基础原料，还有一些牙粉含有诸如糖精等在今天看来不适宜采用的成分。Bicarbonate of soda was used as the basis for most toothpowders, and some contained other ingredients that would not be considered appropriate today, such as sugar.

现存的有关牙膏或牙粉的古时记录很少，直到约公元1000年才有波斯人的书面记载，提醒他们的人民提防用硬磨料做牙粉的危险。Few records related to toothpaste or powder then exist, until around 1000 AD when the Persians wrote to advise their people to be wary of the dangers1 of using hard abrasives as toothpowders.