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n. 成年人21 次
The idea is based on studies of communities such as the Kung of Botswana, where each child is cared for by many adults.
这一观点基于对博茨瓦纳昆族等群体的研究，在那里，每个孩子都由许多成年人照料。
By contrast, in hunter-gatherer societies adults other than the parents can provide almost half of a child’s care.
相比之下，在狩猎采集社会中，父母以外的成年人可以承担孩子近一半的照料工作。
And surfing the web exercised the brain more than reading did among computer-savvy older adults in a 2008 study involving 24 participants at the Semel Institute for Neuroscience and Human Behavior at the University of California, Los Angeles.
而且，在加州大学洛杉矶分校塞默尔神经科学与人类行为研究所2008年开展的一项有24名参与者的研究中，对于精通电脑的老年人来说，上网比阅读更能锻炼大脑。
is most studied in older adults.
在老年人中研究得最多。
The researchers studied “prosocial” and rebellious traits in more than 200 children and young adults, ranging from 11 to 28 years old.
研究人员研究了200多名年龄在11岁到28岁之间的儿童和青年的“亲社会”特质和叛逆特质。
Teenagers were more likely than younger children or adults to report that they did things like unselfishly help a friend.
与年龄更小的孩子或成年人相比，青少年更有可能报告自己做过诸如无私帮助朋友之类的事情。
a. 成年的，充分长成的，成熟的4 次
assigning babies to specific adult caregivers.
把婴儿分配给特定的成年照料者。
They housed eight adult rats with two types of robotic rat — one social and one asocial — for four days.
他们把八只成年鼠与两种机器鼠——一种善于社交，一种不善社交——饲养在一起，为期四天。
Sixty toddlers were each [introduced] to an adult tester holding a plastic container.
六十名幼儿被逐一{{14}}给一位手拿塑料容器的成人测试员。
Pretty in pink: adult women do not remember being so obsessed with the colour, yet it is pervasive in our young girls’ lives.
粉色正美：成年女性不记得自己曾如此痴迷这种颜色，可它却充斥着我们小女孩的生活。