The typhoon uprooted some of the trees. 和 The typhoon uprooted some trees. 的差別在哪裡？如果不好說明，請提供一些例句。

It would depend on context. Adding 'the' makes me think you are talking about some particular trees.

My family has a small cherry orchard on their property. The typhoon uprooted some of the trees. <--- makes it very clear that I'm talking about the orchard trees.

My family has a small cherry orchard on their property. The typhoon uprooted some trees. <--- Technically, I could be talking about other trees on the property and not specifically cherry trees.

This is a very small point, and really not worth worrying about.