But he added it marks just the beginning of deeper research efforts on gravity's effect on antimatter.

但他补充说，这只是人们对重力对反物质影响的更深入研究工作的开始。

Astronomers have theorized that dark matter exists because of gravity's observed effects on galaxies and groups of galaxies.

天文学家推测，暗物质的存在是由于引力对星系和星系团的影响。