例句與造句

1. Frequency , frequency ratio with optional channel 2 ,
   頻率,頻率比,帶可選的通道,
2. Measurements include frequency , frequency ratio with optional channel 2 , period and peak voltage
   量測包括頻率頻率比使用第2個(gè)頻道選項(xiàng)周期與峰值電壓。
3. It's difficult to find optional channels in a sentence. 用optional channels造句挺難的