练习一段音乐4个小时需要集中注意力，但它远不及一个在外过夜的14岁女孩对认知的要求。
Practicing a piece of music for four hours requires focused attention, but it is nowhere near as cognitively demanding as a sleepover with 14-year-old girls.
“关怀营”的情况有所不同，这是一个周末在外过夜的营地，位于旧金山郊外的一个森林会议中心。
Things are different at the Camp for Caring, a weekend sleepover camp at a woodsy conference center outside San Francisco.
在外过夜的郊游计划不得不搁置，据说是因为他们通常住宿的家庭旅馆没有取暖设施。
Plans for an overnight outing have to be shelved, it transpires, because the family hostel the group usually USES has no heating.
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