Kids usually feel happy for short times, like when they get a new toy, but this can change fast. Adults feel happy for longer periods, like being content with their life choices.
孩子们通常只能在短时间内感到快乐,比如他们得到新玩具的时候,但这种快乐可能会很快改变。成年人则可以在较长时间内感到快乐,比如对自己的生活选择感到满足。