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1·The free individual or active citizen can enter the public arena.

自由的个人或积极的公民可以进入公共领域。

2·A citizen scientist is a serious birder, often active in multiple bird conservation and education events.

民间高手是很认真的鸟人，他们通常积极参与多种鸟类保护活动和教育活动。

3·Will you accept my challenge to work hard and to become socially active young citizen?

你们能够接受我提出的努力学习而成为社会中积极主动青年公民的挑战吗？

4·She plays many roles onscreen, but Angelina Jolie never loses sight of her important role as a concerned global citizen and active UNHCR Goodwill Ambassador.

从银幕角色到现实生活，从好莱坞超级明星到联合国难民署亲善大使，安吉丽娜·朱莉是最为奇特的名人之一。