side by side 密切(合作);和睦（相处）;并排;并肩

【例句】
You're working with him side-by-side and you haven't gleaned any personal information about him?
你和他并肩工作，难道就没有获悉一些私人信息？

We can see a day where all people live side by side.
我们可以想象有那么一天所有人都和睦地生活在一起。