We went for a walk in the park.

我们去公园散了散步。

We took a walk in the park.

我们在公园里散步了。

Say, how about a walk in the park?

我说，咱们到公园散步怎么样？

How about taking a walk in the park?

到公园去走走怎么样？

Heart Transplants: a Walk in the Park?

心脏移植：公园里的漫步？