请问曹荣禄老师:
The virtual-reality technology could instantly transport users to the Louvre in Paris, the Acropolis in Athens and the Guggenheim in New York City, all in one day.
(1)位于句尾逗号后面的(all in one day)这部分在句中到底作的是什么成分,为什么,如何判断?
(2)(all in one day)这部分是个什么结构?是个省略结构吗?
谢谢老师!