当今世界，睡眠专家经常说，为了获得更好的睡眠，美国人应该在睡觉前关掉智能手机或平板电脑。
In today's world, sleep experts often say that for a better night's rest, Americans should turn off their smart phones or iPads before sleeping.
我们创建模型和系统的原因是为了更好地理解我们周围或者我们内部世界的某些方面或者局部。
The reason we construct models and systems is to get a better understanding of certain aspects and parts of the universe around us or within us.
组织里使用公开代码产品的开发者也参与世界范围内的公开源码项目——为了使这些产品更好地工作以满足他们的老板的需要。
Developers from organizations using open source products also participate in the worldwide open source project — to make these products work better to meet their employers' needs.
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