有利于老师知识的拓展和更新，有利于教师创设问题情境，适时调整教学手段和方法。
It is useful for teachers to enrich and renew their knowledge. Also it's useful for them to make question situation and adjust teaching methods properly.
设计师是实践者，这意味着他们不应该去努力专注于科学基础知识的拓展而是应用这些知识。
Designers are practitioners, which means they are not trying to extend the knowledge base of science but instead, to apply the knowledge.
从这个意义上说，SETI 是纯科学系统发展的又一个重要推动力，它不断拓展我们的知识面。
In this sense, SETI is another cog in the machinery of pure science which is continually pushing out the horizon of our knowledge.
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