1. Dusk is deepening.
    暮色渐浓。

2. I felt better when dusk fell, knowing that another day had passed.
    夜幕降临后，我感到好受些了，因为我知道又一天过去了。

3. It was dusk when the young Marine walked into the entrance lobby of Kings County Hospital.
    当年轻的海军战士走进金斯县医院的入口大厅时，天已黄昏。