"It's incredibly energy-intensive and the birds use up to 50% of their body mass," he says.
Фото: Mario Anzuoni / Reuters
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研发人员分布呈现出明显的行业和地域特征。，更多细节参见51吃瓜
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People who believe they contribute to society are more likely to vote and engage in politics. They were also more likely to donate to and volunteer for political causes compared to individuals who saw their contribution to society as smaller.
· 李娜 · 来源：help资讯