例句與造句

1. Introduced in the Mark II-B was the Simul-Class power amplifier stage, which combined tubes running in class A and class AB through the same output transformer.
2. He might turn the light elements away from the viewer, so that the pans formed dark lines across the glowing color effects, or combine tubes of different colors to create tints of a third.
3. It's difficult to find combining tube in a sentence. 用combining tube造句挺難的