1. I feel a deep sense of ostalgia when I listen to old songs from my childhood.
我听着我童年的老歌时，感到一种深深的怀旧之情。

2. Looking at old photographs always fills me with ostalgia for the good times we had.
看着旧照片总是让我对我们共度的美好时光充满了怀旧之情。

3. The smell of my grandmother's cooking always brings a wave of ostalgia for my childhood summers.
我祖母做饭的味道总是让我怀念起童年的夏天。

4. Visiting my hometown after many years filled me with a bittersweet sense of ostalgia.
多年后回到故乡，让我心生苦乐参半的怀旧之情。

5. The old bookstore on the corner always gives me a feeling of ostalgia for simpler times.
街角的旧书店总让我怀念起那个简单的时代。

6. Hearing the sound of a train passing by reminds me of the ostalgia I feel for my college days.
听到火车经过的声音让我想起了我对大学时光的怀旧之情。