The moment the sun goes down and disappears below the horizon — the same thing as 'sunset'. The difference is feel, not meaning. 'Sunset' is the everyday word and is also what you call the beautiful red sky itself ('look at that sunset!').

The moment the sun goes down and disappears below the horizon太陽落下、消失在地平線下的那一刻 — the same thing as 'sunset'.──跟「sunset」是同一件事。The difference is差別在 feel, not meaning.語感，不在意思。'Sunset' is the everyday word「sunset」是日常用字， and is also what you call the beautiful red sky itself也可以用來指那片美麗的紅色天空本身 ('look at that sunset!').（例如「look at that sunset!」）。

'Sundown' points at the *time* rather than the view, and it carries a slightly old, American, rural flavour — cowboy films, farm work, 'be home by sundown'. It also turns up in rules and religious contexts where a deadline matters: many Jewish and Muslim observances are counted from sundown to sundown.

'Sundown' points at the *time* rather than the view,「sundown」指的是「時間點」而不是景色， and it carries a slightly old, American, rural flavour而且帶點老派、美式、鄉村的味道 — cowboy films, farm work, 'be home by sundown'.──牛仔電影、農場工作、「be home by sundown」這種說法。It also turns up in rules and religious contexts where a deadline matters:它也會出現在需要精確截止時間的規定和宗教場合裡： many Jewish and Muslim observances are counted from sundown to sundown.許多猶太教和伊斯蘭教的節期，都是從日落算到日落。

It is normally uncountable and used without 'the': 'at sundown', 'before sundown', 'after sundown'. There is a verb 'to sundown' in older or technical use, but you will not need it and should not use it.

It is normally uncountable and used without 'the':它通常是不可數的，而且不加「the」： 'at sundown', 'before sundown', 'after sundown'.像「at sundown」、「before sundown」、「after sundown」。There is a verb 'to sundown' in older or technical use,有一個動詞「to sundown」，用在較舊或較專業的場合， but you will not need it and should not use it.但你不需要用到它，也不應該用它。