求翻译：熔岩可分为结壳熔岩和渣状熔岩两种主要类型。结壳熔岩可沿河谷呈带状分布至几十公里以远，而渣状熔岩则多呈面状分布于喷发源地周围几公里范围之内。在近源相结壳熔岩和渣状熔岩中，常可见到较多的地幔包体。是什么意思？

The lava can be divided into the two main types of crust of lava and slag-like lava. The crust of lava along the river valley was the zonal distribution to tens of kilometers beyond, while the slag lava mostly planar distribution in the spray the birthplace of several kilometers around within the sc

Lava can be divided into the lava and slag lava two main types. The Lava river valley along a 10 km across and a few accommodations, but slag lava is more than solid-fuel source-distribution around the scope of several kilometers. In the more recent source that crusts slag lava lava and often to be

The lava may divide into the encrustation lava and the slaggy lava two kind of predominant types.The encrustation lava may assume the belt-shaped distribution along the river valley to several dozens kilometers beyond, but slaggy lava then assumes the surface shape to distribute around the eruption

Lava can be divided into crust of lava and AA in two main types. Crust is striped of lava along the Valley to dozens of kilometers beyond, while the AA was birthplace of areal distribution in spray around within a few kilometres. In the near-source phase in AA and pahoehoe lava, you can often see mo

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