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命题是断言某事是或不是事实的陈述。
A proposition is an assertion that something is or is not the case.
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.
The future of marine fisheries lies in balancing ecological protection and economic development.
孩子最初爱他们父母,等大一些他们评判父母;然后有些时候,他们原谅父母。