了解穷人的真实生活是设计有效政策帮助他们第一步。
膨胀宇宙模型为宇宙的起源提供了一个可能的解释。
矿工的头盔不仅保护头部——它还象征着辛勤工作的尊严。
There is no such thing as society: there are individual men and women, and there are families.
I've learned that you can't control everything in life, and that's okay.