本文介绍一种用透射光做牛顿环实验的方法，并从理论上证明了这种方法的可行性。
A method of making Newton rings experiment with the transmission light is introduced. The feasibility of the method is proved in theory.
从理论上证明了分层结构式课程体系在高等师范学校中的可行性和优势。
Last, it proves the advantage and feasibility theoretically of curriculum system of structural stratification formula.
从理论上证明了用于直线型行波超声马达的波形成的可行性。
Demonstrates in theory the feasibility of generating the traveling wave used for linear traveling wave ultrasonic motors.
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