设计一架环保飞机是一个十足的挑战。

Designing an environmentally friendly airplane is a real challenge.

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企业架构框架环境内所讨论的观点和所绘制的模型解决了大量当前及潜在的问题。

The viewpoints discussed and the models drawn in the context of an enterprise architecture framework address a range of problems both current and potential.

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1971年的11月13日，美国宇宙飞船水手九号顺利进入火星的计划轨道飞行，成为首架环绕另一颗行星飞行的宇宙飞船。

November 13，1971， The American space probe, Mariner 9, has become the first spacecraft to orbit another planet, swinging into its planned trajectory around Mars without a hitch.

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