Different kinds of activities, such as commenmorative meetings, planting trees,
举行各种各样的活动,例如召开纪念大会,植树造林,
and one odd finding that makes the problem puzzling is that it looks very much as if sleeping is not simply a matter of giving the body a rest.
一项使人对这个问题感到困惑的奇怪的发现是,睡眠在很大程度似乎并不仅仅是为了使身体得到休息。