And as a result they're stronger and more resilient to other, less stressful events when they return home to Earth.

因此，当它们重回地球家园时，它们会更强壮，更能承受住较小压力。

Her hypothesis is that trees remember stressful outside events, something like a drought – a long period of time with little or no rain.

她的假设是，树木会记得有压力的外部事件，比如干旱——长时间少雨或不下雨。