It's the same book, but a new format.
还是那本书, 但这是新的版式.
A program-defined hierarchical ordering of data for a record. Elements within a structure may be formatted differently from each other, whereas elements in an array must all have the same format.
对记录而言，程序定义的数据分层次序。结构内的元素的格式可能彼此不同，而一个数组中的元素的格式必须相同。
