Erichsen number

例句：

1. 1. The Ericson number is a measure of how much time children spend in daycare before they start school.
   埃里克森数是一个衡量儿童在开始上学前在日托中心度过的时间的指标。
2. 2.The Ericson number has been shown to have a positive impact on children's development.
   研究表明，埃里克森数对儿童的发展有积极影响。
3. 3. The Ericson number was developed by psychologist Anders Ericsson to help parents understand their child's learning style.
   埃里克森数是由心理学家安德斯·埃里克森开发的，旨在帮助家长理解孩子的学习风格。