Splitting kids, or adults, into ever-tinier categories has proved a sure-fire way to boost profits.
事实证明，将孩子或成人分成更小的类别一定能提高利润。
The doses I suggested for adults could be halved or quartered.
我建议的成人剂量可以减半或减至四分之一。
Adults behaved in similar ways regardless of whether they were on their own or observed by others.
无论是独自一人还是被他人观察时，成年人的行为方式都没有什么差别。
The study involved ordinary adults watching video clips of babies nine months or younger.
这项研究让普通成年人观看9个月或更小的婴儿的剪辑视频。
In fact, infants recognise the odours of their mothers soon after birth and adults can often identify their children or spouses by scent.
事实上，婴儿在出生后不久就能识别出母亲的气味，而成年人通常能通过气味识别出自己的孩子或配偶。
Today, children and adults at the fair can play new computer games or attempt more traditional games of skill.
如今，儿童和成人可以在展会上玩新的电脑游戏或尝试更传统的技能游戏。
Play allows a young animal to explore its environment and practice skill in comparative safety since the surrounding adults generally do not expect the young to deal with threats or predators.
玩耍可以让一只小动物探索环境并在相对安全的环境中练习技能，因为周围的成年动物通常不期望幼崽应对威胁或捕食者。
More than one-fifth of adults in both the United States and Britain said in a 2018 survey that they often or always feel lonely.
在2018年的一项调查中，超过五分之一的美国和英国成年人表示，他们经常或总是感到孤独。
It's very important for improving the lives of individuals, however, it is estimated that 880 million adults around the world are illiterate, that is, they are unable to read or write.
这对改善个人生活非常重要，然而，据估计，全世界有8.8亿成年人是文盲，也就是说，他们不会阅读或写字。
Their penchant for social drama is not—or not only—a way of distracting themselves from their schoolwork or of driving adults crazy.
他们对社会戏剧事件的渴望不是——或者不仅仅是——一种分散他们对家庭作业注意力的方式，或者一种把成年人逼疯的方式。
Their desire for social drama is not—or not only—a way of distracting themselves from their schoolwork or of driving adults crazy.
他们对社交戏剧的渴望不是——或者不仅仅是——一种让他们从学业中分心或者让成年人发疯的方式。
In contrast, adults behaved in similar ways regardless of whether they were on their own or observed by others.
相比之下，成年人的行为方式却很相似，不管他们是独自一人还是被别人观察。
Older adults, especially those with limited mobility or difficulty driving on their own, are one of the classic use cases for driverless cars.
老年人是无人驾驶汽车的主要使用者之一，尤其是那些行动不便或难以自己开车的老年人。
Adults used props, toys or other objects to demonstrate an action that had 2 steps.
成人们使用道具、玩具等物品来演示包含两个步骤的动作。
Some 14% of young adults lived alone, were a single parent or lived with one or more roommates.
约有14%年轻人或独居，或是单亲，或与一个或多个室友共同生活。
There have been a lot of single case reports where teenagers or young adults are bullied on social media and they end up committing suicide.
很多个案报道，青少年或年轻人在社交媒体上受到欺凌后最终自杀。
Younger adults who went to college or graduate school were doing pretty well.
上过大学或读过研究生的年轻人表现得相当不错。
While cohabitation has been on the rise, the overall share of young adults either married or living with an unmarried partner has substantially fallen since 1990.
尽管同居现象一直呈上升趋势，但自1990年以来，已婚或与未婚伴侣同居的年轻人的比例总体大幅下降。
Park of the University of Texas at Dallas and colleagues demonstrated that learning to knit or do digital photography enhanced memory function in older adults.
德克萨斯大学达拉斯分校的帕克和他的同事证明，学习编织或数码摄影可以增强老年人的记忆功能。
Teens often learn things on TV or from adults about world problems that can make them scared.
青少年经常从电视或成年人那里了解到世界上的问题，这些问题会让他们感到害怕。
Children learn violent behavior from adults or from what they see on television or on the Internet.
孩子们从成人那里或从电视或互联网上看到的东西中学到暴力行为。
A survey found that adults checked their smartphones 85 times a day, or once every 10 minutes.
一项调查发现，成年人每天查看智能手机85次，即每10分钟查看一次。
They matter to adults because bikes with three wheels can help move people or things.
它们对成年人很重要，因为有三个轮子的自行车可以帮助人移动或搬东西。
They matter to adults because bikes with three wheels can help move people or things.
它们对成年人很重要，因为有三个轮子的自行车可以帮助人移动或搬东西。
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