但是无可否认，这本书包含了丰富的面向对象设计专业知识，在我起初阅读的时候，只是觉得这些是有趣的理论，它们不会被真正使用到。
Whilst it undeniably captures a wealth of object-oriented design expertise in one place, I felt initially that much of it was interesting theory that I would never really use.
美术学开设课程旨在帮助学生掌握扎实的理论基础和过硬的专业知识。
The fine art aims to help students have a solid theoretical foundation and excellent art expertise.
就专业知识来说，最重要的是电路、数电、模电、控制理论。
With respect to professional knowledge, the most important is theory of circuit, several report, model report, control.
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