I encountered many hikers who were headed to a distant camp-ground with just enough time to get there before dark.
我遇到许多徒步旅行者，他们正前往一个遥远的露营地，他们刚好可以在天黑前到达那里。
2
The understory is the dark, cool environment under the leaves but over the ground.
灌木层是指位于树叶下、地面上的阴暗、凉爽环境。
3
The scene of the Five Starred Red Flag against the dark sky on the grey lunar surface was taken by a camera on the Chang'e s robotic probe's lander and then sent to the ground control.