After nightfall we drove slowly along picking our way until we found the right turn.
入夜后我们开车慢行，小心前进，直到找到需要的转弯路口。
Let's push on it's nearly nightfall.
咱们继续往前走吧--天快黑了。
The period of light between dawn and nightfall; the interval from sunrise to sunset.
白天，白昼黎明和黄昏之间有光的一段时间; 从日出到日落的间隔
