Final answer:
The two leading nations in terms of volume of exports according to the latest data tend to be China and the U.S., although the correct answer is not confirmed by the provided data.
Step-by-step explanation:
The student has asked about the two leading nations in terms of volume of exports. Based on the provided data concerning trade balances and economic globalization, the correct answer is not explicitly given. However, considering that the U.S. has consistently run trade deficits, and Germany has a significant trade surplus, we can infer that Germany might be one of the leading exporters. To accurately identify the two leading nations in export volume as of the provided data, we need to consider current statistics, which are beyond the information given. As of more recent data not included in the student's resources, China and the U.S. are often cited as the top two exporting countries.