這些現象都非常有趣，值得我們花費心思去探索這個神秘不可測的外太空。

這些現象都非常有趣，值得我們花費心思去探索這個神秘不可測的外太空。

結果 (英文) 1:

These phenomena are very interesting and worth our effort to explore this mysterious and unfathomable outer space.

結果 (英文) 2:

These phenomena are very interesting and worth our effort to explore this mysterious and unpredictable outer space.

結果 (英文) 3:

All these phenomena are very interesting and worthy of our efforts to explore this mysterious and unpredictable outer space.