translation.en: Because it was felt that a school day would last at least eight hours, and you wanted the child to have the ability to use the laptop for at least one full day without having to recharge it.
translation.zh: 因为当他们离开学校之后 还有可能至少持续八个小时，并且 你希望孩子能够使用笔记本 至少一整天都不需要再充电。