Required each day: 25 minutes of recess, 20 minutes of movement, 25 minutes in play centers.
每天的要求是：25分钟休息时间、20分钟运动时间以及25分钟玩耍时间。
A key role that EA could play in a Web 2.0 CMS centers on content protection.
ea在web 2.0CMS中扮演的关键角色集中于内容保护。
In the ear, calcium may play a role in causing damage to hair cells (specialized cells that sense sound vibrations) and the nerve cells that connect the hair cells to the hearing centers of the brain.
在我们的耳朵中，钙离子在导致毛细胞(能够感觉声音振动的特殊细胞)和神经细胞(连接毛细胞和大脑的听觉中枢)的损伤中扮演了重要的作用。
In the B2B experiments, they play the any role of shopping malls, productions and logistics centers.
在B2B实验中，分别扮演商场、生产企业和物流中心这三种角色的任意一种。
In modern power systems, energy control centers play a vital role in guaranteeing the security and optimal operation of a power network system.
在现代电力系统中，能量控制中心在保证电网安全和优化运行的过程中起着关键的作用。
These active centers play many important roles in biological system, such as oxidation-reduction, electron transfer, catalyse of lewis acid.
这些活性中心在生物体中扮演着许多重要角色，如氧化还原、电子传递、路易斯酸催化等。
Herein research can assist location decision-making of logistics centers, and play a role in guiding overall arrangement and network planning of logistics centers.
本文的研究可以辅助物流选址决策，对于物流中心的布局以及网络规划能起到指导作用。
College libraries are the information and resource centers of colleges, and they play an important part in the teaching and learning activities in colleges.
高校图书馆是学校的文献信息中心，在高校教育教学中起着重要的作用。
Cities are centers of population and the center of energy consumption, and play an increasingly important role in the consumption of carbon emissions.
城市是人口聚集与能源消费的中心，在居民消费碳排放中发挥着越来越重要的作用。
If parents want their children to learn to play Musical Instruments, they can take them to special training centers during the free time.
如果一些幼儿的家长希望孩子学奏某种乐器，则可以在自由活动时间把孩子带到专门训练场所去接受有关训练。
If parents want their children to learn to play Musical Instruments, they can take them to special training centers during the free time.
如果一些幼儿的家长希望孩子学奏某种乐器，则可以在自由活动时间把孩子带到专门训练场所去接受有关训练。
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