vacumn tube造句

例句与造句

1. But I heard the mellow sounds of it almost every night, sitting in an upstairs bedroom where the only light came from the big vacumn tubes that light up inside my Hallicrafters SX-99 shortwave receiver . ( Husted, Atlanta Journal-Constitution ) . 20.
2. It's difficult to find vacumn tube in a sentence. 用vacumn tube造句挺难的