一个五岁的孩子可以轻易地找到和使用智能手机上的应用程序。

A five-year-old child may easily find and use apps on a smart phone.

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汉娜开始思考她该如何能帮上忙，但显然一个五岁的孩子在解决无家可归的问题上能做的事情并不多。

Hannah started to think about how she could help, but, of course, there is not a lot one five-year-old can do to solve the problem of homelessness.

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研究表明，如果给定15分钟的自由玩耍时间，四到五岁的孩子会将其中三分之一的时间花在有关空间、数学和建筑的活动上。

Research shows that given 15 minutes of free play, four- and five-year-olds will spend a third of this time engaged in spatial, mathematical, and architectural activities.

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If you could take your five year-old or eight year-old in to get a vaccine that was orally administered instead of a shot that's a much easier thing to do.

如果你带着五岁或者八岁的孩子,去口服而不是去注射疫苗,那将会轻松许多

耶鲁公开课 - 生物医学工程探索课程节选