He was walking down the road one dusky Friday evening.
在一个昏暗的周五晚上他正沿路走着。
《柯林斯英汉双解大词典》
The dusky salamander lives only in slow-moving streams where organic debris settles and accumulates.
灰蝾螈只生活在缓慢流动的溪流中,有机碎片在此沉淀堆积。
Therefore, it is probably the increased flow caused by suburban development that is responsible for the dusky salamander's virtual disappearance from New York State.