He has no connection with that company.

他同那家公司没有联系。

There is no connection between these events.

这些事件之间没有任何联系。

There was no connection seen with meningioma risk.

但与罹患脑膜瘤的风险未见直接联系。

A: the simple answer is no, there is no connection.

答：答案是无关。

There is no connection between the two incidents.

那两件事情之间没有关联。