A jet propelled man is in flight during the first day of flying practice at the 2009 Australian International Airshow and Aerospace Exposition at Avalon Airport, in Melbourne, Australia, March 10, 2009. The six day event aims to highlight the future direction of aeronautical and aerospace technology, coinciding with the 40th anniversary of the first manned mission which landed on the moon.     在澳大利亚墨尔本举行的国际航空航天博览会上，一个人身着喷气式推进器飞翔在天空中。此次博览会正值人类首次登上月球40周年之际，旨在为未来的航空航天技术指明方向。