层上中部的宽广的分布边界形态及其变化，可能反映软流圈对周围地球物质的同化熔蚀作用；
The wide boundary form and its change in the upper and middle parts of layer B"may reflect the corrosion and assimilation of Earth's material in the surroundings by the asthenosphere."
流槽损伤的主要形式是由弯曲力及热应力引起的变形和强烈的热作用引起的熔蚀。
The principal forms of the damages in the pouring spout are the deform caused by the bending forces and thermal stress as well as the fusion aroused by the intensive thermal effect.
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