pointer expression造句

in this section, the following pointer expressions are discussed
本节讨论下列指针表达式：
abstract : by analyzing the level of multi-dimensional array pointer, the paper reveals essential differences of different pointer expressions and in concrete examples, the definition and usage of pointers in different level are given
文摘:通过分析多维数组指针的级别，揭示了不同指针表达式之间的本质区别，并通过具体的例子阐明了不同级别指针的定义方式和使用方法。
It's difficult to find pointer expression in a sentence. 用pointer expression造句挺难的