例句與造句

1. Octave - band and fractional octave - band analog and digital filters , specifications for
   倍頻帶和分?jǐn)?shù)倍頻帶模擬及數(shù)字濾波器的規(guī)范
2. It's difficult to find analog and digital filters in a sentence. 用analog and digital filters造句挺難的