And third, the uneven pattern of otter decline is better explained by the orca predation theory than by the pollution theory.

第三， 虎鲸捕食理论比污染理论更好地解释了水獭减少的不均衡模式。

He argues that orca predation theory can explain the uneven pattern of otter decline because in some places, predation has access to where sea otters live.

他认为逆戟鲸捕食理论可以解释水獭数量下降的不均匀模式， 因为在某些地方，捕食行为可以进入海獭居住的地方。