No significant correlation was observed between diatom red tide and alongshore pollutants discharge.

而近岸排污与硅藻赤潮发生的相性不明显。

That is completely irrelevant to the subject under discussion.

这跟讨论的主题完全不相。

It was all irrelevant, but I didn’t dare interrupt him in midflow.

的事情全都不相，但我还是不敢中途打。

The two questions are quite separate.

这两个问题是完全不相的。

The spatial variation of seismic ground motions is produced primaryly by the three factors of geometric incoherency effect,wave-passage effect, and local site effect.

导致地震变异性的原因主要在于:几何不相性效应、行波效应、局部场地条件效应。