The reason for this is that global data ties all the separate parts of your script together, and often if you make a change in one part, something else will break in another part.

原因是全局变量把不同页面之间的变量结合在了一起，于是当你修改某一部分时，另一部分就会产生变化。

youdao

The U.S. attorney's office in Manhattan investigated the party's ties to Data and Field Services in 2010.

WSJ: Working Families Party Officials Served With Subpoenas

Of the rest for which there is data, only five hold less than 30 companies with such ties in portfolio.

CENTERFORSECURITYPOLICY: Terror Investments of the 50 States

The news ties in to the overall trend of carriers experimenting with pricing to offset the growing demand for wireless data.

FORBES: Analyst: Sprint's New Smartphone Data Plans Show Confidence