thermionic triode造句

例句与造句

1. The thermionic triode, a vacuum tube invented in 1907, enabled amplified radio technology and long-distance telephony.
2. Early units utilised spark gap technology, but due to limitations the approach was rapidly superseded by the use of multi-electrode thermionic triode ( valve ) based oscillators.
3. It's difficult to find thermionic triode in a sentence. 用thermionic triode造句挺难的