例句與造句

1. Let ' s work a quick example . this example will use many of the properties and facts from the brief review of summation notation in the extras chapter
   讓我們快速做一個(gè)例子，簡(jiǎn)單回顧一下我們從別的章節(jié)總結(jié)出的許多的結(jié)論和數(shù)據(jù)，這個(gè)例子將會(huì)用到他們。
2. It's difficult to find summation notation in a sentence. 用summation notation造句挺難的