这跟我好像没关系。

Zhè gēn wǒ hǎoxiàng méi guānxi.

It seems this has nothing to do with me.

公司应该要跟客人建立好关系。

Gōngsī yīnggāi yào gēn kèrén jiànlì hǎo guānxi.

The company should establish a good relationship with customers.

他们两个是什么关系啊？

Tāmen liǎng gè shì shénme guānxi a?

What relationship do those two have?