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相关明显。

That is completely irrelevant to the subject under discussion.

这跟讨论主题相关。

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

他说事情都相关，但我还是敢中途打他。

The two questions are quite separate.

这两个问题是相关。

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.

导致地震动空间变原因主要在于:几何相关效应、行波效应、局部场地条件效应。