I met him by chance out walking yesterday.

昨天出去散步时我无意中遇到了他。

《柯林斯英汉双解大词典》

I wish we could get more kids out walking.

我希望我们能让更多的孩子出去散步。

youdao

There are whole rows of them, and when they are out walking they have high black hats on their heads.

他们有很多人，当他们在外面走的时候，头上还戴着高高的黑帽子。

youdao

Zach decided to help victims by walking around his area with his little red wagon collecting and giving out bottles of water.

VOA: special.2009.07.31

As the two armies approach each other, I should make it clear, they start out walking at a certain clip.

当两支军队互相接近,我该说得详细一些,他们疾驰前进

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and then this man like walking passed me, pulled me up out of the manhole.

这时有一个人走过，把我拉了出来。

I have 实战 - SpeakingMax英语口语达人

In extreme cases, you might think about muzzling the dog if you're out walking amongst other people.

NPR: The Ethicist: Weighing a Canine Conundrum

He often said he painted like a man out walking, unaware of his steps unless he stumbled.

ECONOMIST: Roman Opalka

Her body, covered by plastic bags and a quilt cover, was found by a man out walking his dog.

BBC: Leanne's family to make statement