The other half includes the often large volume of non-exercise physical activity.
而另一半的时间又有绝大多数是非运动型的活动。
Be aware of the volume control during the activity to avoid any disturbance to classes.
活动时避免声浪过大，以免影响他人上课。
Be aware of the volume control during the activity to avoid any disturbance to classes.
活动时避免声浪过大，以免影响他人上课。
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