His father smiles and then laughs with his son, and for a moment Samuel feels light, easy.

他父亲咧咧嘴，继而跟他儿子一起大笑了起来，有那么一会儿，塞缪尔感觉到很愉快轻松。

youdao

Features: small volume, light, easy to use, broad filtering area, low block rate, high filtering speed, no pollution, good heat stability and chemical stability.

其特点是体积小、重量轻、使用方便、过滤面积大、堵塞率低、过滤速度快、无污染、热稳定性及化学稳定性好。

youdao

Features: small volume, light, easy use, broad filtering area, low block rate, high filtering speed, no pollution, good heat stability and chemical stability.

其特点是体积小、重量轻、使用方便、过滤面积大、堵塞率低、过滤速度快、无污染、热稳定性及化学稳定性好。

youdao

So, one thing they did, because it was so easy to measure kinetic energy of electrons, is plot the frequency of the light against the kinetic energy of the electron that's coming off here. And in your notes and on these slides here, just for your reference, I'm just pointing out what's going to be predicted from classical physics.

他们做的其中一件事,因为测量电子动能是很容易的，就是画出光的频率,和出射电子动能之间的关系,在讲义的这里，仅仅是,为了做个比较，我要指出，经典物理所给出的预测,这个不作为对你们的要求。

麻省理工公开课 - 化学原理课程节选

The trains are former two-level 1960s commuter carriages from Chicago, refurbished and redecorated in white, and opened to provide greater natural light and easy sightseeing.

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Starting with the tablet itself, it's surprisingly light and easy to hold -- in fact, it's just half the weight of the aging Cintiq 12WX.

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Also, they're light, easy to carry, generally easier to learn than a smartphone or computer and don't require much typing -- considerable benefits to people with arthritic hands or joints.

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