867. Climate change is not a pure reason for (this) scientific research.

气候变化并不是(这项)科学研究的纯粹原因。

He ate the fish with great care. The eating was an act of pure reason. Although he had no desire to eat, he knew that he must eat to live.

他把鱼生吃下去，费劲地咀嚼着。因为吃东西已成了纯粹出于理智的动作，他虽然并不想吃，但是他知道，为了活下去，他必须吃。