在任何瞬间，只能有一个信号处理程序处理一个活动进程的一个信号。
There can be only one signal handler per signal per process active at any instant.
研究人员指出，相机虽然能记录任何瞬间，但需要人们积极主动地决定要拍什么，才能达到同样的效果。
This means cameras that record any moment of an experience without the individual's active decision of what to capture are unlikely to have the same effect, according to the researchers.
毕竟，即使是最激动人心的动作场面，也只能代表一个瞬间；在第一眼之后，任何运动的错觉都消失了。
After all, even the most action-filled exciting painting can represent only one moment in time; and any illusion of movement is gone after the first glance.
应用推荐