In order to survive, to feed, clothe, and shelter himself and his children, man has to learn how to use things he finds in nature, and this means that he has to study and learn about nature.
为了生存，为了自己及后代的衣、食、住，人类必须学会使用他可以从自然界得到的东西，这就意味着人类必须研究并了解自然。
This study also finds that sellers 'reputation, product price, and buyer's risk attitude has a significant effect on buyer's risk perception, which influences his OES adoption decision.
本研究也发现卖方声誉、待售商品价格以及买方风险态度等因素对买方的感知风险有重要的影响，而感知风险又影响买方是否采用第三方担保服务的决定。
When Kevin finds out that his Chinese father wants to send him away to England to study, he decides to spend a summer day with his friend James.
当凯文发现，他的中国父亲要送他去英国留学，他决定陪他的朋友詹姆斯一个夏天。
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