They are my best friends.

I walk in the park every day.

I walk to school every day.

They were running side by side.

They were walking side by side.

They are advancing two projects in parallel.

This product is a parallel import.

They are my best friends.

He was hesitant to start a new business, but I encouraged him by saying, 'There is a danger of tragedy in any attempt.'

She is beautiful like a peony when she stands, a peony when she sits, and a lily when she walks.