1. In her old age, she often experienced costalgia, longing for the days of her youth.
在她老年时期，她经常感到对青春时光的怀念，渴望回到过去的日子。

2. The song triggered a deep sense of costalgia in him, reminding him of the happy moments he had once cherished.
这首歌让他深深感受到对过去的怀念，让他回忆起曾经珍惜的美好时刻。