It might sound like the ideal formula for perfect teeth, but, actually, it's not. In fact, any one of those habits could increase your risk of dental erosion or decay.

听上去，这些都是让你拥有一口完美牙齿的理想方案，可事实并非如此。

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Perfect teeth - white, straight and evenly aligned - may be the ideal in America, but that aesthetic is not for everyone.

洁白、整齐、排列均匀的牙齿也许在美国堪称完美，但这种审美标准并不适合于所有人。

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And when they smiled back, which they did suddenly, they displayed rows of perfect teeth.

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They had saucer eyes, with very white whites, and perfect teeth (not so easy to come by ninety years ago).

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