There is absoulutely no such thing in the world as love or hate without cause or reason.

世界上没有无缘无故的爱，也没有无缘无故的恨。

youdao

Neither party shall cancel the contract without sufficient cause or reason.

双方均不得无故解除合同。（如果译成“…没有原因和理由”的话，就不够精炼。）

youdao