例句與造句

1. paul nipkow obtains a patent in germany for tv, using a selenium cell and a mechanical scanning disk . first long distance call : boston to nyc
   保羅?尼普可夫獲得德國電視發(fā)明專利。他在電視技術(shù)中采用硒光電管和機(jī)械掃描盤。第一次長途呼叫：從波士頓到紐約市。
2. It's difficult to find selenium cells in a sentence. 用selenium cells造句挺難的