例句與造句

1. in the first section, the background and development of wavelet analysis are introduced . the frame concept and basic theory of three types of frames on l2 ( r ) are summarized in primarily in the second section : in the third section, the main results of the thesis are stated . accurately, we have theorem 1 ( theorem 3.3 in the thesis )
   第一節(jié)介紹了小波分析的背景和發(fā)展歷史；第二節(jié)總結(jié)了框架，主要是l~2(r)上三種框架的基本理論；第三節(jié)是論文的主要結(jié)果，討論了weyl-heisenberg框架恒等式成立的條件，具體得出定理1(文中定理3.3)。
2. It's difficult to find frame concept in a sentence. 用frame concept造句挺難的