sun set

基本解释

Clerk: Sun-set hotel. May I help you?
柜台服务员：日落旅馆，我能帮您什么吗？
The once sun-never-set Empire finally collapsed.
日不落帝国终于日薄西山了。
Moreover, they expounds why manufacturing industry cannot be a sun-set industry from the aspects of the extension of its connotation, its historical mission, and the technical assurance.
并从制造业内涵的拓延和历史使命以及技术保证等方面论述了制造业不会成为夕阳产业的原因。

At the annual meeting of the Carbon Disclosure Project--a non-profit investor organization devoted to greater transparency in greenhouse gas emission statistics--Sun released a set of open-source software tools that companies can use to track carbon emissions.
FORBES: Magazine Article
As the sun set behind the Rolls-Royce and the evening became cool as it often does in this part of the country, women were given bright orange silk shawls—with the Rolls-Royce logo.
FORBES: Creating An Experience: Rolls-Royce, Vacheron Constantin Host A Thomas Keller Dinner
In Barrow, the sun doesn't set between mid-May and early August.
NPR: Life in the Land of the Midnight Sun

Sunset is the time in the evening when the sun disappears out of sight from the sky.
A sunset is the colours and light that you see in the western part of the sky when the sun disappears in the evening.