视平线

例句：

1. 1. The sun sets behind the mountain at sunset.
   太阳在日落时落在山后面。
2. 2. The view from the top of the hill is breathtaking.
   从山顶上往下看，景色令人叹为观止。
3. 3. The ship sailed over the horizon as the sun set.
   随着太阳西沉，那艘船驶过了地平线。