未经测试的程序是无法正常工作的。

The rat in the maze is not just learning a series of turns, but is building up a cognitive map of the whole situation.

I have traveled so far to see the wonders of the world, but it is the people I have met along the way that have truly amazed me.

最好的渔业管理植根于科学和对自然的尊重。