For an analogy, studying geometry alone will not allow you to become a professional engineer, designing four-lane Bridges.
打个比方，仅仅学习几何学不能让你成为专业的工程师，去设计四车道大桥。
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Designing a spacecraft from scratch, says the 24-year-old part-time engineer, one of five grad students attending what's billed as the only space-architecture master's degree program on Earth.