尽管孩子们在公园玩了一整天，他们的白衬衫依然干净如新。

Despite playing in the park all day, their white shirts stayed ___unsoiled.

尽管生活在充满诱惑的城市中，他始终保持着纯洁的心灵。

Despite living in a city full of temptations, he kept his mind ___unsoiled.