Therefore, the wave equation pre-stack depth migration, a method starting directly from the rolling surface, is discussed.

为此，探讨了直接从起伏地表开始的波动方程叠前深度偏移方法。

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Damage state: when in the installation and removal of such use to the raceway and the rolling surface wounds caused by the axial linear.

损伤状态：当在安装和使用这种搬迁到滚道和滚动表面轴向线性造成的创伤。

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As chemical precursors stream onto the surface of a rolling metal or plastic substrate, they react with one another to form a network of nanoparticles.

各化学母质流向滚动中的金属或塑料基片的表面，他们互相作用，形成一层纳米级微粒网状结构。

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"Given the subtle slopes of the greens, don't be surprised if you see putts rolling off the putting surface should the wind get up, " he said.

BBC: THE LOWDOWN