The old man sat in the armchair, watching the sun setting down.

老人坐在椅子里，看着太阳落山。

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It may be so, but you can imagine a picture. In a summer evening, the sun is setting down slowly, giving off the golden light, which lightens the lake.

可能是这样的，但你可以想象，在一个夏日的傍晚，夕阳徐徐落下，发出金色的光，它照亮了湖面。

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Harry's eyes flew open as he wrenched himself back to the present: He was lying on the bank of the lake in the setting sun, and Ron and Hermione were looking down at him.

哈利突然睁开眼睛，把自己猛拉回当前的现实中。 他躺在夕阳下的湖岸上，罗恩和赫敏在低头看着他。

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Cooling down in the lake, and then watching the sun setting over the dunes while soaking in a hot spring is a surreal experience.

BBC: Siwa: An Egyptian oasis