wholesale
adjective [only before noun]
1. connected with goods that are bought and sold in large quantities, especially so they can be sold again to make a profit: wholesale goods / prices
Compare: RETAIL
2. (especially of sth bad) happening or done to a very large number of people or things: the wholesale slaughter of innocent people
wholesale adverb: We buy the building materials wholesale. ◆ These young people die wholesale from heroin overdoses.
第壹個意思是：批發，retail意為“零售”
第二個意思是：大量的，大規模的（常作貶義）
本句中取第二個意思；
shift是名詞，意為“轉移”of後面的是定語，修飾shift, “。。。。。的轉移”