例句與造句

1. In this paper , according to the periodically active characteristics shown in the historical earthquake data in this region since 1900 , we describe the rule of seismicity with sine function and furthermore make a preliminary forecast of the seismicity intensity and the developing trend in northeast china till the year of 2008 by using the periodogram of time sequence and other analytical methods
   摘要根據(jù)東北地區(qū)1900年以來的歷史地震資料所顯示的周期性活動(dòng)特點(diǎn)，用正弦函數(shù)描述其地震活動(dòng)規(guī)律，并結(jié)合時(shí)間序列的周期圖及其他一些地震活動(dòng)性分析方法，對(duì)該地區(qū)未來1 ~ 3年地震活動(dòng)發(fā)展趨勢和地震強(qiáng)度作了初步預(yù)測。
2. It's difficult to find preliminary forecasting in a sentence. 用preliminary forecasting造句挺難的