经过化学反应 after chemical reaction
经过艰难困苦而学到 learn sth the hard way
学习经过 Learning through
经过长期努力学习技能 Through long-term efforts study skills ; After a long hard skills
过渡经济学 Economics of Transition
经过一天的教学 after a day's teaching
经过了一年的学习 After a year of learning ; After a year of study
经过学术性家庭医学 Academic Family Medicine
经过生物化学作用 biochemcal reaction
经过高二一年的学习 After sophomore year of study
经过多年的努力，她于1996年来到清华大学学习生物学。
After years of hard work, in 1996, she went to Tsinghua University to study biology.
从遗传学角度来看，当你不知道下一餐会在明天还是一周以后这的确说得通，但是当你的下一餐就是在随时开车经过的快餐店，那就是一个问题了。
Genetically, this made sense when you didn't know if your next meal would be tomorrow or a week from now, but when your next meal is whenever you drive by a fast-food restaurant, that's a problem.
最后我还是鼓起勇气，坐在我家附近那条安静的道路旁，看着她骑着车在家门口一次次地经过，并琢磨着为什么孩子们会对学自行车这样的经历记忆深刻。
As I sat along our (at last) quiet street, watching her go back and forth in front of our home, I thought about how learning to ride your bike is usually something a kid will remember.
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