In laboratory simulations of challenging activities such as driving, those who felt in control of their lives pumped out lower levels of stress hormones such as cortisol.
在实验室的挑战性活动（比如驾车）的模拟中，那些觉得生活在自己的掌控之中的人产生的应激激素（比如皮质醇）更少。
They consider we should arrange some challenging activities.
他们认为我们应该安排一些更具有挑战性的活动。
And they tend to be engaged in stimulating or intellectually challenging activities.
而且，他们还倾向于参加富有刺激或智力挑战的活动。
English is taught in a stress free environment whereby children widen their general knowledge, vocabulary and concept development through participation in interesting and challenging activities.
爱儿坊的孩子们在轻松自由的环境中，通过主动参与各种有趣而富于挑战的活动，在不知不觉中掌握概念、丰富词汇、扩展知识。
Those who engaged in activities that were not intellectually challenging, either in a social group or alone, did not show such improvements.
那些参加了非智力挑战活动的人，无论是在社会群体中还是单独活动，都没有表现出这样的进步。
Some previous studies have suggested that challenging your brain with mentally stimulating activities might help.
先前的一些研究表明，参与心理刺激的活动来挑战你的大脑可能会有所帮助。
Those who engaged in activities that were not intellectually challenging either in a social group or alone, did not show such improvements.
那些参加了非智力考验型活动的人，无论是社交团队还是独自一人，都没有表现出这样的改进。
While summer can be challenging due to vacations and the demands of children off from school, the holiday season can be a killer because of the extra load of activities, tasks and calendar overload.
因为假期和孩子们不上学的要求，夏天成为最具挑战的季节，因为额外的活动、任务和日程负担，假期可以说是一个思想集中的杀手。
Visibility into and control of the development activities at all sites can be challenging, especially when collaborating with other companies or with teams in different time zones.
对在所有地点上的开发活动的可见性和控制是一个挑战，特别是当与其他公司或不同时区的团队合作时。
Mental energy can be increased through the stress and conditioning method, through challenging mental study and tasks, deep learning and creative activities.
心理能量可以过压力和调节方法，通过富有挑战性的精神研究和任务，通过深入学习和创作活动来加强。
Challenging technical work, a rich learning environment, supportive colleagues, plenty of caffeine, and a lot of fun social activities.
富有挑战性的科研工作，广阔的学习空间，能提供良好支持的同事，喝不完的咖啡和丰富多彩的社交活动。
Many studies have found that challenging mental activities such as puzzles can help preserve brain function, but few have looked at what role the Internet might play.
此前有很多研究表明，一些智力挑战游戏如猜谜等可以保持大脑的活力，但很少有人注意到网络发挥的作用。
Hart does not lack confidence when it comes to challenging questions about his on - and off-field activities.
当有人质疑哈特场上和场下的表现时，他从来是自信满满。
Throughout the study they would test the participants on various self-control activities from resisting temptations to persevering through challenging tasks.
在整个实验过程中，研究者测试参与者在各种诱惑下的抵制能力并坚持去完成具有挑战性的任务。
How to identify transacting intent effectively in energy management contracting is challenging both to business activities and academic research.
如何有效识别合同能源管理的交易意图是产生于实践中的问题，但也对理论研究提出了挑战。
Indoor activities are somewhat challenging as well. There are chess and book reading which can also develop our mind.
户内运动在某种程度上也是具有挑战性的。下棋和读书也能够促进我们的思维。
Therefore, it is challenging and crucial for English language teachers to design and carry out communicative classroom activities.
交际英语课堂教学活动是交际英语教学的关键与核心。
Keep yourself busy by scheduling daily activities that are interesting, fun or even challenging.
忙碌起来，把一天填满有意思甚至有挑战性的活动。
Yet Veblen's leisure class was not idle. Rather they engaged in "exploit" : challenging and creative activities such as writing, philanthropy and debating.
同时Veblen指出他所称的休闲并不是无聊的休闲，而更倾向于探索：做有挑战性和有创造性的活动，比如写作，慈善和辩论。
A career in Electrical Engineering offers challenging opportunities over a wide range of activities from research and design to operations, management and planning.
从事电气工程提供富有挑战性的机会，各种各样的活动，从研究和设计，业务，管理和规划。
A career in Electrical Engineering offers challenging opportunities over a wide range of activities from research and design to operations, management and planning.
从事电气工程提供富有挑战性的机会，各种各样的活动，从研究和设计，业务，管理和规划。
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