离开主题远离，特别是指脱离写作或演说主题；跑题。
To turn aside, especially from the main subject in writing or speaking; stray.
技术是指以实践特别是工业上对科学知识的应用。
What is technology? The application of scientific knowledge for practical purpose, especially in industry.
技术是指以实践特别是工业上对科学知识的应用。
What is technology? The application of scientific knowledge for practical purpose, especially in industry.
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