perennial river

... perennial irrigation常年灌溉 perennial river常流河；常年河 periglacial冰缘 ...

[地理] perennial stream

枯水期 时之河川可视为常流河(Perennial Stream )，丰水期时比枯水期时多出之部分河川可视为间歇溪 （Interm ittent stream ），共长3．41 km (中寮溪）及2．60 km (扇平溪），由...

 permanent river

... permanent repair 日常修理 permanent river 常流河 permanent set 永久变形 ...

 permanent stream

... permanent strain ==> 永久应变 permanent stream ==> 常流河 permanent stretch ==> 永久伸长 ...