例句與造句

1. by observing the frequencies of each shaft of the compressor set, sorting out the feature frequencies which may stimulate probable mal-functions of low frequency vibration, then examining the characteristics of signals'spectrum charts and brushing away any other causes, it can be confirmed that the lower frequency is the clap-frequency of that set
   考察壓縮機組各轉(zhuǎn)軸的頻率后，分析可能激發(fā)低頻振動故障的各特征頻率，觀察有關(guān)測點頻譜圖的特點，逐一排除其他原因，確定該低頻項為壓縮機的拍頻。
2. It's difficult to find spectrum chart in a sentence. 用spectrum chart造句挺難的