1、交情深
...think in depth about a question; 问题想得深be on intimate terms; 交情深The two of them are very intimate friends. 两人的关系很深。 ...
2、以老兄
...居于帝王之位，比喻妄以首脑自居(古代君主自称“ 孤”或“寡人”) [ call each other brothers；be on intimate terms ] 以老兄、老弟相称，表示对人亲热或拉拢 [ the equator ] 环绕地球的最大周径，借指靠近地球赤道的国家 ..
3、关系亲密
... [be interrelated;be related to] 彼此关连;相互牵涉;互相关心 [be on intimate terms] 关系亲密,感情好 [intimate friend] 亲密的朋友 ...