That's the class of star that Naslim and Jeffery were studying, hoping to ferret out clues as to why this category of star has so much less hydrogen on their surfaces than other similar stars.

那就是Naslim和Jeffery正在研究的恒星类型，希望找到这颗恒星比其他相似的恒星的表面少了许多氢元素的原因。

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He typically spends eight hours a day in class, and an additional two hours every day on homework and studying.

他每天要在课堂上度过八个小时，还要花两个小时做作业和学习。

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Curiosity is the prerequisite of happy studying, hands-on skill is the key of class, and mental exercise is the foundation of the class.

好奇心是快乐学习的前提，动手能力是乐木课堂的核心，脑力锻炼是乐木课堂的基础。

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Some parents have refused to let overweight kids be taken out of class for more exercise, saying they should focus on studying.

BBC: Taiwan wages nationwide battle with the bulge

Every Saturday and Sunday morning were dedicated to team meetings or class time or office hours with professors or catching up on homework or studying.

WSJ: Duke University