Yet traveling back to smog-bound Beijing, past industrial factories, high-rise apartment blocks under construction,shopping malls and the ever growing number of cars, the future once more looks uncertain.

VOA: standard.2010.08.03

Locally x got bound to 3, 3 I added 1 to it, whoop-dee-doo, 4 I get back a 4. But what's the value of x?

这是我想要的对吧？,在局部程序中x被赋值为，我给它加了1，我得到了？

麻省理工公开课 - 计算机科学及编程导论课程节选