孩子们并排站着拍照。

The children stood ___side ___by ___side for the photo.

公园里，两位年长的朋友并肩走着，分享着故事。

In the park, two elderly friends walked ___side ___by ___side, sharing stories.

这两本书并排放在图书馆的书架上。

The two books sat ___side ___by ___side on the library shelf.