What is happening in Pakistan is likely to be a catastrophic concatenation of multiple factors.

巴基斯坦正在发生的事情很可能是多种因素的灾难性串联。

He himself, facing a firing squad, would not understand too well the concatenation of the series of subtle but irrevocable accidents that brought him to that point.

他自己，面对行刑队，不会太理把他带到那个地步的一系列不可挽回的事故的串联。

For example, many programming languages have a string concatenation function, or " strcat" , which takes in two strings, and copies the second one to the end of the first.

例如，许多编程语言都有字符串连接函数或“strcat”，它接收两个字符串，并将第二个字符串复制到第一个字符串的末尾。