Welt

例句：

1. 1. The explorer set out to discover the Welt's secrets.
   探险家出发去探索世界的奥秘。
2. 2. She spent her childhood in the Welt's bustling city.
   她童年时在地球上繁忙的城市度过。
3. 3. The Welt is constantly changing and evolving.
   世界一直在变化和演变。