1. You can see the star at nightfall.
   黄昏时你能看到那颗星星。
2. We drove back at nightfall.
   傍晚我们乘车回去。
3. Let's push on it's nearly nightfall.
   咱们继续往前走吧－－天快黑了。
4. The prisoners were fastened up at nightfall.
   黄昏时囚犯们被关进牢房。
5. The man walked on until nightfall.
   那人一直走到天黑。

　1个名词解释