Within two hours
例句
上述建议还重申了美国儿科学会现有的建议：孩子应该将使用电子设备进行娱乐的时间限制在每天两小时以内；两岁以下的儿童不应看电视或上网。
The policy also reiterated the AAP's existing recommendations: Kids should limit the amount of screen time for entertainment to less than two hours per day; children younger than 2 shouldn't have any TV or Internet exposure.
重点词汇释义
小时
hour; hr.
以内
within; within the limits of; including; less than
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