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One day while the woman was going to her son's school, she noticed that someone was walking behind her.

一天，当这位妇女去她儿子的学校时，她注意到有人走在她后面。

youdao

Aha: Here she is, walking behind me.

啊哈：她在这里，就在我身后。

youdao

We were walking behind a mother and father and their two young sons who had been attending the fair.

WHITEHOUSE: Office of Science and Technology Policy Blog

He could only hope the Selma march changed more minds than were in the rows of us walking behind him.

CNN: 48 years after MLK march, voting rights still vulnerable

You can feel explosions of various magnitudes, sense a person walking behind you or wind rustling through trees, feel the sensation of wheels splashing through varying depths of water, discern between a V8 and a V6 engine.

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