例句與造句

1. If the generator is inside a tube of ( say ) 1 m diameter, it requires around 10 wave reflections for the field to settle to static conditions, which restricts pulse leading edge width to 30 ns or more.
2. Vacuum tubes, operating at temperatures requiring cooling-or least properly ventilated cabinets-suffer varying temperatures in operation, so maintaining the constant output pulse leading edge ( required for proper delay-line timing ) was well-nigh impossible.
3. It's difficult to find pulse leading edge in a sentence. 用pulse leading edge造句挺難的