例句與造句

1. A theorem for the summation of series expressed by function terms derived from function identities is established . some examples in practical application are given
   摘要建立了由函數(shù)恒等式所導(dǎo)出的函數(shù)項級數(shù)的求和定理，并給出了具體應(yīng)用的實例。
2. It's difficult to find summation of series in a sentence. 用summation of series造句挺難的