谜题不存在。

合作在推进癌症研究中至关重要。

The end of history will be a very sad time. The struggle for recognition, the willingness to risk one's life for a purely abstract goal, the worldwide ideological struggle that called forth daring, courage, imagination, and idealism, will be replaced by economic calculation, the endless solving of technical problems, environmental concerns, and the satisfaction of sophisticated consumer demands.

一个组织的一致性质量决定了其可靠性的质量。

创新不仅仅是创造新事物；它关乎改变人们的生活。