They share the troubles and joys , and can be called damon and pythias .

他们有福同享，有难同当，称得上是一对莫逆之交。

If you can only choose one , then I think damon and pythias is more rare .

如果只能选其一的话，那我想生死之交更难得。

Those two friends are as loyal as damon and pythias .

这两个朋友如刎颈之交般的忠诚。

The two strangers helped each other during the earthquake and later became damon and pythias .

那两个素昧平生的人在地震中互相帮助，后来成了莫逆之交。