normal tooth thickness

例句：

1. 1. The normal temperature for ahuman body is 98.6degrees Fahrenheit.
   人体正常体温是98.6华氏度。
2. 2. The normal weight for a child ofthis age is around 100pounds.
   这个年龄的孩子的正常体重大约是100磅。
3. 3. The normal range ofblood pressure for adults is between 120/80 mmHgand 140/90mmHg.
   成年人的正常血压范围是120/80毫米汞柱到140/90毫米汞柱。