翻译和例句：
coating (氟化物外衣) on their teeth. Fluoride keeps acid (酸) from eating through the tooth&rsquo... cavities (蛀牙). This is because sharks have a fluoride coating (氟化物外衣) on their teeth. Fluoride keeps acid ……
. Moreover, they don’t get cavities (蛀洞). This is because sharks have a fluoride coating (氟化物... (氟化物外衣) on their teeth. Fluoride can keep acid (酸) from eating through their teeth. That’s why ……
choose your toothpaste, make sure it has fluoride (氟化物). Fluoride makes your teeth strong.Use floss ……
fluoride (氟化物). Too much fluoride can damage your teeth over time. A pea-sized amount of toothpaste can ……
has fluoride (氟化物). Using too much fluoride in a long time is bad for your teeth. For young children ……
're choosing a toothpaste, make sure it contains fluoride (氟化物). Fluoride makes your teeth strong ……
for you.What is in toothpaste?Toothpaste contains chemicals that clean and make it foam.Fluoride(氟化物 ……
our teeth healthy. Tea is rich in fluoride (氟化物). Fluoride makes the teeth brighter and stronger.Tea ……
and fluoride (氟化物) toothpaste at least56a day— once after breakfast and once before we go to bed. We ……
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