Since then, scientists have been studying the ship and bringing to the surface many of the artifacts -- things made by hand -- that they have found.

VOA: special.2011.07.26

All right. So please raise your hand now if you think there'll be sufficient energy to eject electrons from the metal surface?

好的，如果你们认为,有足够的能量从金属表面,射出电子请举手？

麻省理工公开课 - 化学原理课程节选