例句與造句

1. second, step into the electrical frequency and the empty affect empty sum frequency
   二步進(jìn)電機(jī)的空載牽入頻率和空載牽出頻率？
2. empty sum frequency is entered in the normal functioning of the electrical pulse frequency gradually rise to the highest frequency step electrical bad step
   空載牽出頻率是指步進(jìn)電機(jī)在正常運(yùn)轉(zhuǎn)情況逐漸升高脈沖頻率使步進(jìn)電機(jī)不失步的最高頻率。
3. It's difficult to find empty sum in a sentence. 用empty sum造句挺難的