相反，高中校长格雷格埃雷波发表了书面声明，为项目辩护说这是一个动手学习，非常有价值的教学课。
Instead, high school principal Gregg Errebo issued a written statement defending the project as a valuable lesson in hands-on learning.
你终于下决心来学习一门新语言。在过去的10年里，你一直想着要学这门新语言，但由于种种原因，一直没有真正动手学习。
You might decide to learn that new language that you've been meaning to for the last 10 years.
他宁愿做一个水管工的伙伴，做一份真正需要动手的工作，也不愿坐在桌子前学习流体静力学，而不知道这些东西有什么实际用途。
He would rather be a plumber's mate and do a real job that requires doing than learning about hydrostatics sitting at a desk, without understanding what practical use they are going to be.
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