发现的名词形式用英文怎么表达

　　He saw life as a voyage of discovery.

　　他把生命看作是一次探索未知世界的航行。

　　The discovery of a child's body in the river has shocked the community.

　　在河里发现一个孩子的尸体，这使社区大为震惊。

　　This discovery was perceived as a major breakthrough.

　　这一发现被视为一项重大突破。