And NASA is also being called on to develop new technologies to solve problems involved in long-term space flight for humans and robots.

VOA: special.2010.04.28

because then you can solve new problems on midterms and what not if you understand the conceptual part.

因为这样你可以解决中期的新的问题，如果你不理解的话，就不好说了。

我的梦想是百万富翁 - SpeakingMax英语口语达人