英语翻译请翻译全文 How many teeth?Newborn babies do not usually have any teeth．Their front teeth begin to grow when they are about six months old．Most children have all their“milk”teeth by the time they are two years old．There are
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英语翻译请翻译全文 How many teeth?Newborn babies do not usually have any teeth．Their front teeth begin to grow when they are about six months old．Most children have all their“milk”teeth by the time they are two years old．There are
英语翻译
请翻译全文 How many teeth?
Newborn babies do not usually have any teeth．Their front teeth begin to grow when they are about six months old．Most children have all their“milk”teeth by the time they are two years old．There are 20 teeth altogether．
The front teeth are used to cut food by biting．The back“double”teeth are used to grind up the food．This makes the food easier to swallow．
Foods that are sticky and have a lot of sugar in them will make holes in the teeth if the teeth are not cleaned with a brush．
The“milk”teeth start to fall out when children are six or seven years old．The new teeth that grow in their place have to last for ever!
Newborn babies do not usually have any teeth．Their front teeth begin to grow when they are about six months old．Most children have all their“milk”teeth by the time they are two years old．There are 20 teeth altogether．
英语翻译请翻译全文 How many teeth?Newborn babies do not usually have any teeth．Their front teeth begin to grow when they are about six months old．Most children have all their“milk”teeth by the time they are two years old．There are
新生婴儿通常没有什么牙.他们的前排的牙开始生长是自六个月大的时候开始的.大部分的孩子乳齿长全的时候是在他们两岁大时.总共有20颗牙.
前牙是用来咬开食物的.后面的两只牙是用来磨碎食物的.这样可以让食物容易吞咽.
如果吃到一些粘性的含大量糖的食物又没有用牙刷清洁干净的话,会长很多牙洞.
当孩子六岁或七岁的时候他们的乳牙开始脱落.新的牙就在原来的位置长出来就必须一直用下去.