例句與造句

1. After doing the modifying of machine in calculating the real amplitude and frequency - time analysis to all selected records , the group velocity was calculated for each seismograms
   對(duì)這些地震記錄做儀器頻響特性校正，同時(shí)進(jìn)行頻時(shí)分析( ftan ) ，求其群速度頻散。
2. It's difficult to find frequency-time analysis in a sentence. 用frequency-time analysis造句挺難的