翻译理论中的logical extension 是什么意思，有无具体例子介绍

logical extension逻辑延伸
Gasoline a Logical Extension of Wal-Mart's Reach

If Wal-Mart goes through with its plans to open as many as 1,000 Wal-Mart-branded gasoline stations at its stores nationwide it will find a receptive consumer, eager to save a few cents per gallon in the face of rising fuel prices.

A consumer study conducted in February by Leo J. Shapiro & Associates found that more than four out of 10 U.S. households said they would make most of their gasoline purchases at Wal-Mart if its stores sold gas. Of course, many Wal-Marts already sell gasoline - more than 800 Wal-Mart stores have gasoline pumps, most of them operated under a lease agreement with Arkansas-based Murphy Oil Corp. In addition, Tesoro Corp., San Antonio, and Sunoco, Philadelphia, also lease space from Wal-Mart for gas pumps under the Mirastar and Optima names, respectively.

But the recent announcement that the giant retailer would begin to open gas stations at its s