In 1939 the turbojet brought an entirely new method of propulsion.
1939年，涡喷发动机引入了一种全新的推力方法。
A new technique which is entirely different from the available method was proposed.
提出了一种不同于现有方法的半固态合金制备新技术。
A new technique which is entirely different from the available method was proposed.
提出了一种不同于现有方法的半固态合金制备新技术。
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