求翻译：河谷熔岩是龙岗火山另一类广泛分布的溢流式火山活动产物。龙岗山脉是区域分水岭，山脉以西的河流汇入三通河，以东河流汇入头道松花江。是什么意思？

Valley lava is the product of the other widely distributed in the Longgang volcanic overflow volcanic activity. Longgang Mountains are the regional watershed in the mountains west of the river to import three links River, east of the river to import the Songhua River, head and said.

Longgang Valley volcanic lava is another type of broad distribution of the overflow-volcanic activity. Longgang mountains are mountains regional watershed, west of the river empties into the river, 3 east river empties into the Songhua River Road.

The river valley lava is the dragon hillock volcano another kind of widespread distribution overflow type volcanic activity product.The Longgang Shan arteries are the region watershed, west of the sierra rivers converge three Tonghe, flows and converges by Dong River begins study the Songhua River.

Valleys are Longgang volcanic lava overflowing volcanic activity of another type of widely distributed product. Longgang Shan pulse is a regional watershed, River West of the mountains into the tees River, River into toudao Songhua River to the East.

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