A person may cause evil to others not only by his actions but by his inaction, and in either case, he is justly accountable to them for the injury.
Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.
全球金融危机是现代历史上最严重的危机,需要采取非同寻常的应对措施。
食品安全方面的创新不是可选项,而是我们对消费者的道德义务。