There were two children ahead, walking side by side.

前面有两个孩子肩并肩走着。

《牛津词典》

Travellers get from one side to the other by walking across a footbridge that spans a little stream.

旅游者通过一座横跨小溪的人行桥从一边走到另一边。

《柯林斯英汉双解大词典》

Everywhere we went I had trouble making out whichwas I, the one walking at my side, the one walking in my pants.

无论走到哪里，我时常恍恍然分不清哪个是我自己，是走在我身边这孩子呢，还是套在我裤子里那家伙。

youdao

These include trouble walking, weakness especially on one side of the body, difficulty seeing and difficulty speaking.

VOA: special.2009.08.12

The camp was so large that a man had to have one week's supply of food when walking from one side of the camp to the other.

VOA: special.2009.01.24

"There's a classic one here which is lads walking to work, it's early morning you can see on the left hand side there's a band which is very typical of these big work institutions,".

VOA: standard.2009.12.09

Former Ghana international Kevin-Prince Boateng made global headlines when he reacted to abusive chanting from a section of Pro Patria fans in a friendly against the fourth tier side by walking off the pitch -- and the entire Milan side followed him.

CNN: Lazio charged with racist fan behavior

About to give an argument, they began walking side-by-side up to the counsel table.

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The lonely path, trodden by at least two individuals walking side by side, was preserved immaculately in volcanic ash.

BBC: NEWS | Science/Nature | Robotics show Lucy walked upright